src/libsystemd-network/test-ipv4ll-manual.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 <net/if.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <linux/veth.h>
  13
  14 #include "sd-event.h"
  15 #include "sd-ipv4ll.h"
  16 #include "sd-netlink.h"
  17
  18 #include "alloc-util.h"
  19 #include "in-addr-util.h"
  20 #include "netlink-util.h"
  21 #include "parse-util.h"
  22 #include "string-util.h"
  23 #include "util.h"
  24
  25 static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) {
  26         _cleanup_free_ char *address = NULL;
  27         struct in_addr addr = {};
  28
  29         assert_se(ll);
  30
  31         if (sd_ipv4ll_get_address(ll, &addr) >= 0)
  32                 assert_se(in_addr_to_string(AF_INET, (const union in_addr_union*) &addr, &address) >= 0);
  33
  34         switch (event) {
  35         case SD_IPV4LL_EVENT_BIND:
  36                 log_info("bound %s", strna(address));
  37                 break;
  38         case SD_IPV4LL_EVENT_CONFLICT:
  39                 log_info("conflict on %s", strna(address));
  40                 break;
  41         case SD_IPV4LL_EVENT_STOP:
  42                 log_error("the client was stopped with address %s", strna(address));
  43                 break;
  44         default:
  45                 assert_not_reached("invalid LL event");
  46         }
  47 }
  48
  49 static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) {
  50         sd_ipv4ll *ll;
  51
  52         assert_se(sd_ipv4ll_new(&ll) >= 0);
  53         assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0);
  54
  55         assert_se(sd_ipv4ll_set_ifindex(ll, ifindex) >= 0);
  56         assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0);
  57         assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0);
  58
  59         if (seed_str) {
  60                 unsigned seed;
  61
  62                 assert_se(safe_atou(seed_str, &seed) >= 0);
  63
  64                 assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0);
  65         }
  66
  67         log_info("starting IPv4LL client");
  68
  69         assert_se(sd_ipv4ll_start(ll) >= 0);
  70
  71         assert_se(sd_event_loop(e) >= 0);
  72
  73         assert_se(!sd_ipv4ll_unref(ll));
  74
  75         return EXIT_SUCCESS;
  76 }
  77
  78 static int test_ll(const char *ifname, const char *seed) {
  79         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  80         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  81         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  82         struct ether_addr ha;
  83         int ifindex;
  84
  85         assert_se(sd_event_new(&e) >= 0);
  86
  87         assert_se(sd_netlink_open(&rtnl) >= 0);
  88         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  89
  90         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  91         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  92         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  93
  94         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  95         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  96
  97         client_run(ifindex, seed, &ha, e);
  98
  99         return EXIT_SUCCESS;
 100 }
 101
 102 int main(int argc, char *argv[]) {
 103         log_set_max_level(LOG_DEBUG);
 104         log_parse_environment();
 105         log_open();
 106
 107         if (argc == 2)
 108                 return test_ll(argv[1], NULL);
 109         else if (argc == 3)
 110                 return test_ll(argv[1], argv[2]);
 111         else {
 112                 log_error("This program takes one or two arguments.\n"
 113                           "\t %s <ifname> [<seed>]", program_invocation_short_name);
 114                 return EXIT_FAILURE;
 115         }
 116 }