src/libsystemd-network/test-acd.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6
   7 #include <linux/veth.h>
   8 #include <net/if.h>
   9
  10 #include "sd-event.h"
  11 #include "sd-ipv4acd.h"
  12 #include "sd-netlink.h"
  13
  14 #include "in-addr-util.h"
  15 #include "netlink-util.h"
  16 #include "tests.h"
  17 #include "util.h"
  18
  19 static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
  20         assert_se(acd);
  21
  22         switch (event) {
  23         case SD_IPV4ACD_EVENT_BIND:
  24                 log_info("bound");
  25                 break;
  26         case SD_IPV4ACD_EVENT_CONFLICT:
  27                 log_info("conflict");
  28                 break;
  29         case SD_IPV4ACD_EVENT_STOP:
  30                 log_error("the client was stopped");
  31                 break;
  32         default:
  33                 assert_not_reached("invalid ACD event");
  34         }
  35 }
  36
  37 static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
  38         sd_ipv4acd *acd;
  39
  40         assert_se(sd_ipv4acd_new(&acd) >= 0);
  41         assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
  42
  43         assert_se(sd_ipv4acd_set_ifindex(acd, ifindex) >= 0);
  44         assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
  45         assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
  46         assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
  47
  48         log_info("starting IPv4ACD client");
  49
  50         assert_se(sd_ipv4acd_start(acd, true) >= 0);
  51
  52         assert_se(sd_event_loop(e) >= 0);
  53
  54         assert_se(!sd_ipv4acd_unref(acd));
  55
  56         return EXIT_SUCCESS;
  57 }
  58
  59 static int test_acd(const char *ifname, const char *address) {
  60         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  61         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  62         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  63         union in_addr_union pa;
  64         struct ether_addr ha;
  65         int ifindex;
  66
  67         assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0);
  68
  69         assert_se(sd_event_new(&e) >= 0);
  70
  71         assert_se(sd_netlink_open(&rtnl) >= 0);
  72         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  73
  74         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  75         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  76         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  77
  78         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  79         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  80
  81         client_run(ifindex, &pa.in, &ha, e);
  82
  83         return EXIT_SUCCESS;
  84 }
  85
  86 int main(int argc, char *argv[]) {
  87         test_setup_logging(LOG_DEBUG);
  88
  89         if (argc == 3)
  90                 return test_acd(argv[1], argv[2]);
  91         else {
  92                 log_error("This program takes two arguments.\n"
  93                           "\t %s <ifname> <IPv4 address>", program_invocation_short_name);
  94                 return EXIT_FAILURE;
  95         }
  96 }