src/libsystemd-network/test-ipv4ll-manual.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <net/if.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <linux/veth.h>
   8
   9 #include "sd-event.h"
  10 #include "sd-ipv4ll.h"
  11 #include "sd-netlink.h"
  12
  13 #include "alloc-util.h"
  14 #include "in-addr-util.h"
  15 #include "netlink-util.h"
  16 #include "parse-util.h"
  17 #include "string-util.h"
  18 #include "tests.h"
  19 #include "util.h"
  20
  21 static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) {
  22         _cleanup_free_ char *address = NULL;
  23         struct in_addr addr = {};
  24
  25         assert_se(ll);
  26
  27         if (sd_ipv4ll_get_address(ll, &addr) >= 0)
  28                 assert_se(in_addr_to_string(AF_INET, (const union in_addr_union*) &addr, &address) >= 0);
  29
  30         switch (event) {
  31         case SD_IPV4LL_EVENT_BIND:
  32                 log_info("bound %s", strna(address));
  33                 break;
  34         case SD_IPV4LL_EVENT_CONFLICT:
  35                 log_info("conflict on %s", strna(address));
  36                 break;
  37         case SD_IPV4LL_EVENT_STOP:
  38                 log_error("the client was stopped with address %s", strna(address));
  39                 break;
  40         default:
  41                 assert_not_reached("invalid LL event");
  42         }
  43 }
  44
  45 static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) {
  46         sd_ipv4ll *ll;
  47
  48         assert_se(sd_ipv4ll_new(&ll) >= 0);
  49         assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0);
  50
  51         assert_se(sd_ipv4ll_set_ifindex(ll, ifindex) >= 0);
  52         assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0);
  53         assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0);
  54
  55         if (seed_str) {
  56                 unsigned seed;
  57
  58                 assert_se(safe_atou(seed_str, &seed) >= 0);
  59
  60                 assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0);
  61         }
  62
  63         log_info("starting IPv4LL client");
  64
  65         assert_se(sd_ipv4ll_start(ll) >= 0);
  66
  67         assert_se(sd_event_loop(e) >= 0);
  68
  69         assert_se(!sd_ipv4ll_unref(ll));
  70
  71         return EXIT_SUCCESS;
  72 }
  73
  74 static int test_ll(const char *ifname, const char *seed) {
  75         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  76         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  77         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  78         struct ether_addr ha;
  79         int ifindex;
  80
  81         assert_se(sd_event_new(&e) >= 0);
  82
  83         assert_se(sd_netlink_open(&rtnl) >= 0);
  84         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  85
  86         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  87         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  88         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  89
  90         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  91         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  92
  93         client_run(ifindex, seed, &ha, e);
  94
  95         return EXIT_SUCCESS;
  96 }
  97
  98 int main(int argc, char *argv[]) {
  99         test_setup_logging(LOG_DEBUG);
 100
 101         if (argc == 2)
 102                 return test_ll(argv[1], NULL);
 103         else if (argc == 3)
 104                 return test_ll(argv[1], argv[2]);
 105         else {
 106                 log_error("This program takes one or two arguments.\n"
 107                           "\t %s <ifname> [<seed>]", program_invocation_short_name);
 108                 return EXIT_FAILURE;
 109         }
 110 }