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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright (C) 2014 Tom Gundersen <teg@jklm.no>
***/
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/veth.h>
#include <net/if.h>
#include "sd-event.h"
#include "sd-ipv4acd.h"
#include "sd-netlink.h"
#include "in-addr-util.h"
#include "netlink-util.h"
#include "util.h"
static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
assert_se(acd);
switch (event) {
case SD_IPV4ACD_EVENT_BIND:
log_info("bound");
break;
case SD_IPV4ACD_EVENT_CONFLICT:
log_info("conflict");
break;
case SD_IPV4ACD_EVENT_STOP:
log_error("the client was stopped");
break;
default:
assert_not_reached("invalid ACD event");
}
}
static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
sd_ipv4acd *acd;
assert_se(sd_ipv4acd_new(&acd) >= 0);
assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
assert_se(sd_ipv4acd_set_ifindex(acd, ifindex) >= 0);
assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
log_info("starting IPv4ACD client");
assert_se(sd_ipv4acd_start(acd) >= 0);
assert_se(sd_event_loop(e) >= 0);
assert_se(!sd_ipv4acd_unref(acd));
return EXIT_SUCCESS;
}
static int test_acd(const char *ifname, const char *address) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
union in_addr_union pa;
struct ether_addr ha;
int ifindex;
assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0);
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_netlink_open(&rtnl) >= 0);
assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
client_run(ifindex, &pa.in, &ha, e);
return EXIT_SUCCESS;
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
if (argc == 3)
return test_acd(argv[1], argv[2]);
else {
log_error("This program takes two arguments.\n"
"\t %s <ifname> <IPv4 address>", program_invocation_short_name);
return EXIT_FAILURE;
}
}
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