src/libsystemd-network/test-acd.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   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 "util.h"
  17
  18 static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
  19         assert_se(acd);
  20
  21         switch (event) {
  22         case SD_IPV4ACD_EVENT_BIND:
  23                 log_info("bound");
  24                 break;
  25         case SD_IPV4ACD_EVENT_CONFLICT:
  26                 log_info("conflict");
  27                 break;
  28         case SD_IPV4ACD_EVENT_STOP:
  29                 log_error("the client was stopped");
  30                 break;
  31         default:
  32                 assert_not_reached("invalid ACD event");
  33         }
  34 }
  35
  36 static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
  37         sd_ipv4acd *acd;
  38
  39         assert_se(sd_ipv4acd_new(&acd) >= 0);
  40         assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
  41
  42         assert_se(sd_ipv4acd_set_ifindex(acd, ifindex) >= 0);
  43         assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
  44         assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
  45         assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
  46
  47         log_info("starting IPv4ACD client");
  48
  49         assert_se(sd_ipv4acd_start(acd) >= 0);
  50
  51         assert_se(sd_event_loop(e) >= 0);
  52
  53         assert_se(!sd_ipv4acd_unref(acd));
  54
  55         return EXIT_SUCCESS;
  56 }
  57
  58 static int test_acd(const char *ifname, const char *address) {
  59         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  60         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  61         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  62         union in_addr_union pa;
  63         struct ether_addr ha;
  64         int ifindex;
  65
  66         assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0);
  67
  68         assert_se(sd_event_new(&e) >= 0);
  69
  70         assert_se(sd_netlink_open(&rtnl) >= 0);
  71         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  72
  73         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  74         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  75         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  76
  77         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  78         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  79
  80         client_run(ifindex, &pa.in, &ha, e);
  81
  82         return EXIT_SUCCESS;
  83 }
  84
  85 int main(int argc, char *argv[]) {
  86         log_set_max_level(LOG_DEBUG);
  87         log_parse_environment();
  88         log_open();
  89
  90         if (argc == 3)
  91                 return test_acd(argv[1], argv[2]);
  92         else {
  93                 log_error("This program takes two arguments.\n"
  94                           "\t %s <ifname> <IPv4 address>", program_invocation_short_name);
  95                 return EXIT_FAILURE;
  96         }
  97 }