sd-ipv4{acd,ll}: add simple test programs

These programs should be run manually, typically two instances on a
veth pair to check conflict detection.

Both test programs take the ifname as input, the ACD also takes the
IP address to check, whereas LL (optionally) takes the seed, which
determines the sequence of IP addresses to try.

1 files changed, 117 insertions, 0 deletions

diff --git a/src/libsystemd-network/test-acd.c b/src/libsystemd-network/test-acd.c
new file mode 100644
index 0000000000..f1f14ee119
--- /dev/null
+++ b/src/libsystemd-network/test-acd.c
@@ -0,0 +1,117 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  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 <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <linux/veth.h>
+#include <net/if.h>
+
+#include "sd-event.h"
+#include "sd-netlink.h"
+#include "sd-ipv4acd.h"
+
+#include "util.h"
+#include "event-util.h"
+#include "netlink-util.h"
+#include "in-addr-util.h"
+
+static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
+        assert_se(acd);
+
+        switch (event) {
+        case IPV4ACD_EVENT_BIND:
+                log_info("bound");
+                break;
+        case IPV4ACD_EVENT_CONFLICT:
+                log_info("conflict");
+                break;
+        case 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_event_unref_ sd_event *e = NULL;
+        _cleanup_netlink_unref_ sd_netlink *rtnl = NULL;
+        _cleanup_netlink_message_unref_ 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;
+        }
+}