src/libsystemd-network/test-acd.c

   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
  22 #include <errno.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 #include <linux/veth.h>
  27 #include <net/if.h>
  28
  29 #include "sd-event.h"
  30 #include "sd-ipv4acd.h"
  31 #include "sd-netlink.h"
  32
  33 #include "in-addr-util.h"
  34 #include "netlink-util.h"
  35 #include "util.h"
  36
  37 static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
  38         assert_se(acd);
  39
  40         switch (event) {
  41         case SD_IPV4ACD_EVENT_BIND:
  42                 log_info("bound");
  43                 break;
  44         case SD_IPV4ACD_EVENT_CONFLICT:
  45                 log_info("conflict");
  46                 break;
  47         case SD_IPV4ACD_EVENT_STOP:
  48                 log_error("the client was stopped");
  49                 break;
  50         default:
  51                 assert_not_reached("invalid ACD event");
  52         }
  53 }
  54
  55 static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
  56         sd_ipv4acd *acd;
  57
  58         assert_se(sd_ipv4acd_new(&acd) >= 0);
  59         assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
  60
  61         assert_se(sd_ipv4acd_set_index(acd, ifindex) >= 0);
  62         assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
  63         assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
  64         assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
  65
  66         log_info("starting IPv4ACD client");
  67
  68         assert_se(sd_ipv4acd_start(acd) >= 0);
  69
  70         assert_se(sd_event_loop(e) >= 0);
  71
  72         assert_se(!sd_ipv4acd_unref(acd));
  73
  74         return EXIT_SUCCESS;
  75 }
  76
  77 static int test_acd(const char *ifname, const char *address) {
  78         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  79         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  80         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  81         union in_addr_union pa;
  82         struct ether_addr ha;
  83         int ifindex;
  84
  85         assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0);
  86
  87         assert_se(sd_event_new(&e) >= 0);
  88
  89         assert_se(sd_netlink_open(&rtnl) >= 0);
  90         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  91
  92         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  93         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  94         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  95
  96         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  97         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  98
  99         client_run(ifindex, &pa.in, &ha, e);
 100
 101         return EXIT_SUCCESS;
 102 }
 103
 104 int main(int argc, char *argv[]) {
 105         log_set_max_level(LOG_DEBUG);
 106         log_parse_environment();
 107         log_open();
 108
 109         if (argc == 3)
 110                 return test_acd(argv[1], argv[2]);
 111         else {
 112                 log_error("This program takes two arguments.\n"
 113                           "\t %s <ifname> <IPv4 address>", program_invocation_short_name);
 114                 return EXIT_FAILURE;
 115         }
 116 }