131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright (C) 2014 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <net/if.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <linux/veth.h>
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#include "sd-event.h"
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#include "sd-ipv4ll.h"
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#include "sd-netlink.h"
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#include "event-util.h"
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#include "in-addr-util.h"
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#include "netlink-util.h"
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#include "parse-util.h"
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#include "string-util.h"
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#include "util.h"
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static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) {
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_cleanup_free_ char *address = NULL;
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struct in_addr addr = {};
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assert_se(ll);
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if (sd_ipv4ll_get_address(ll, &addr) >= 0)
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assert_se(in_addr_to_string(AF_INET, (const union in_addr_union*) &addr, &address) >= 0);
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switch (event) {
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case SD_IPV4LL_EVENT_BIND:
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log_info("bound %s", strna(address));
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break;
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case SD_IPV4LL_EVENT_CONFLICT:
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log_info("conflict on %s", strna(address));
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break;
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case SD_IPV4LL_EVENT_STOP:
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log_error("the client was stopped with address %s", strna(address));
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break;
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default:
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assert_not_reached("invalid LL event");
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}
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}
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static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) {
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sd_ipv4ll *ll;
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assert_se(sd_ipv4ll_new(&ll) >= 0);
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assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0);
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assert_se(sd_ipv4ll_set_index(ll, ifindex) >= 0);
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assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0);
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assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0);
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if (seed_str) {
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unsigned seed;
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assert_se(safe_atou(seed_str, &seed) >= 0);
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assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0);
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}
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log_info("starting IPv4LL client");
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assert_se(sd_ipv4ll_start(ll) >= 0);
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assert_se(sd_event_loop(e) >= 0);
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assert_se(!sd_ipv4ll_unref(ll));
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return EXIT_SUCCESS;
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}
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static int test_ll(const char *ifname, const char *seed) {
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_cleanup_event_unref_ sd_event *e = NULL;
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_cleanup_netlink_unref_ sd_netlink *rtnl = NULL;
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_cleanup_netlink_message_unref_ sd_netlink_message *m = NULL, *reply = NULL;
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struct ether_addr ha;
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int ifindex;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_netlink_open(&rtnl) >= 0);
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assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
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assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
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assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
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assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
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assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
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assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
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client_run(ifindex, seed, &ha, e);
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return EXIT_SUCCESS;
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}
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int main(int argc, char *argv[]) {
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log_set_max_level(LOG_DEBUG);
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log_parse_environment();
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log_open();
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if (argc == 2)
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return test_ll(argv[1], NULL);
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else if (argc == 3)
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return test_ll(argv[1], argv[2]);
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else {
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log_error("This program takes one or two arguments.\n"
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"\t %s <ifname> [<seed>]", program_invocation_short_name);
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return EXIT_FAILURE;
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}
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}
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