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

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright (C) 2014 Tom Gundersen <teg@jklm.no>
   4 ***/
   5
   6 #include <errno.h>
   7 #include <net/if.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <linux/veth.h>
  11
  12 #include "sd-event.h"
  13 #include "sd-ipv4ll.h"
  14 #include "sd-netlink.h"
  15
  16 #include "alloc-util.h"
  17 #include "in-addr-util.h"
  18 #include "netlink-util.h"
  19 #include "parse-util.h"
  20 #include "string-util.h"
  21 #include "util.h"
  22
  23 static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) {
  24         _cleanup_free_ char *address = NULL;
  25         struct in_addr addr = {};
  26
  27         assert_se(ll);
  28
  29         if (sd_ipv4ll_get_address(ll, &addr) >= 0)
  30                 assert_se(in_addr_to_string(AF_INET, (const union in_addr_union*) &addr, &address) >= 0);
  31
  32         switch (event) {
  33         case SD_IPV4LL_EVENT_BIND:
  34                 log_info("bound %s", strna(address));
  35                 break;
  36         case SD_IPV4LL_EVENT_CONFLICT:
  37                 log_info("conflict on %s", strna(address));
  38                 break;
  39         case SD_IPV4LL_EVENT_STOP:
  40                 log_error("the client was stopped with address %s", strna(address));
  41                 break;
  42         default:
  43                 assert_not_reached("invalid LL event");
  44         }
  45 }
  46
  47 static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) {
  48         sd_ipv4ll *ll;
  49
  50         assert_se(sd_ipv4ll_new(&ll) >= 0);
  51         assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0);
  52
  53         assert_se(sd_ipv4ll_set_ifindex(ll, ifindex) >= 0);
  54         assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0);
  55         assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0);
  56
  57         if (seed_str) {
  58                 unsigned seed;
  59
  60                 assert_se(safe_atou(seed_str, &seed) >= 0);
  61
  62                 assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0);
  63         }
  64
  65         log_info("starting IPv4LL client");
  66
  67         assert_se(sd_ipv4ll_start(ll) >= 0);
  68
  69         assert_se(sd_event_loop(e) >= 0);
  70
  71         assert_se(!sd_ipv4ll_unref(ll));
  72
  73         return EXIT_SUCCESS;
  74 }
  75
  76 static int test_ll(const char *ifname, const char *seed) {
  77         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  78         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  79         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  80         struct ether_addr ha;
  81         int ifindex;
  82
  83         assert_se(sd_event_new(&e) >= 0);
  84
  85         assert_se(sd_netlink_open(&rtnl) >= 0);
  86         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  87
  88         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  89         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  90         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  91
  92         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  93         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  94
  95         client_run(ifindex, seed, &ha, e);
  96
  97         return EXIT_SUCCESS;
  98 }
  99
 100 int main(int argc, char *argv[]) {
 101         log_set_max_level(LOG_DEBUG);
 102         log_parse_environment();
 103         log_open();
 104
 105         if (argc == 2)
 106                 return test_ll(argv[1], NULL);
 107         else if (argc == 3)
 108                 return test_ll(argv[1], argv[2]);
 109         else {
 110                 log_error("This program takes one or two arguments.\n"
 111                           "\t %s <ifname> [<seed>]", program_invocation_short_name);
 112                 return EXIT_FAILURE;
 113         }
 114 }