11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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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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***/
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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 "alloc-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_ifindex(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_(sd_event_unrefp) sd_event *e = NULL;
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_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
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_cleanup_(sd_netlink_message_unrefp) 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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