/*** This file is part of systemd. Copyright (C) 2014 Tom Gundersen <teg@jklm.no> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #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_index(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; } }