sd-icmp6-nd: Add initial Router Advertisement test case

Feed a Router Advertisement to the code and expect proper events
each time. The sending part is ignored, as all of it is static code
in the real dhcp_network_icmp6_send_rs() function.

Makefile.am

@@ -2651,11 +2651,23 @@ test_ipv4ll_LDADD = \
 	libsystemd-internal.la \
 	libsystemd-shared.la
 
+test_icmp6_rs_SOURCES = \
+	src/systemd/sd-dhcp6-client.h \
+	src/libsystemd-network/sd-icmp6-nd.h \
+	src/libsystemd-network/dhcp6-internal.h \
+	src/libsystemd-network/test-icmp6-rs.c
+
+test_icmp6_rs_LDADD = \
+	libsystemd-network.la \
+	libsystemd-internal.la \
+	libsystemd-shared.la
+
 tests += \
 	test-dhcp-option \
 	test-dhcp-client \
 	test-dhcp-server \
-	test-ipv4ll
+	test-ipv4ll \
+	test-icmp6-rs
 
 # ------------------------------------------------------------------------------
 if ENABLE_GTK_DOC

src/libsystemd-network/test-icmp6-rs.c

@@ -0,0 +1,155 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  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 <netinet/icmp6.h>
+
+#include "socket-util.h"
+
+#include "dhcp6-internal.h"
+#include "sd-icmp6-nd.h"
+
+static struct ether_addr mac_addr = {
+        .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
+};
+
+static bool verbose = false;
+static sd_event_source *test_hangcheck;
+static int test_fd[2];
+
+static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
+                             void *userdata) {
+        assert(false);
+
+        return 0;
+}
+
+int dhcp_network_icmp6_bind_router_solicitation(int index) {
+        assert(index == 42);
+
+        if (socketpair(AF_UNIX, SOCK_DGRAM, 0, test_fd) < 0)
+                return -errno;
+
+        return test_fd[0];
+}
+
+static int send_ra(uint8_t flags) {
+        uint8_t advertisement[] = {
+                0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
+                0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
+                0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+                0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+                0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+                0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
+                0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
+        };
+
+        advertisement[5] = flags;
+
+        assert(write(test_fd[1], advertisement, sizeof(advertisement)) ==
+               sizeof(advertisement));
+
+        if (verbose)
+                printf("  sent RA with flag 0x%02x\n", flags);
+
+        return 0;
+}
+
+int dhcp_network_icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
+        return send_ra(0);
+}
+
+static void test_rs_done(sd_icmp6_nd *nd, int event, void *userdata) {
+        sd_event *e = userdata;
+        static int idx = 0;
+        struct {
+                uint8_t flag;
+                int event;
+        } flag_event[] = {
+                { 0, ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE },
+                { ND_RA_FLAG_OTHER, ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER },
+                { ND_RA_FLAG_MANAGED, ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED }
+        };
+        assert(nd);
+
+        assert(event == flag_event[idx].event);
+        idx++;
+
+        if (verbose)
+                printf("  got event %d\n", event);
+
+        if (idx < 3)
+                send_ra(flag_event[idx].flag);
+        else
+                sd_event_exit(e, 0);
+}
+
+static void test_rs(sd_event *e) {
+        usec_t time_now = now(CLOCK_MONOTONIC);
+        sd_icmp6_nd *nd;
+
+        if (verbose)
+                printf("* %s\n", __FUNCTION__);
+
+        assert(sd_icmp6_nd_new(&nd) >= 0);
+        assert(nd);
+
+        assert(sd_icmp6_nd_attach_event(nd, e, 0) >= 0);
+
+        assert(sd_icmp6_nd_set_index(nd, 42) >= 0);
+        assert(sd_icmp6_nd_set_mac(nd, &mac_addr) >= 0);
+        assert(sd_icmp6_nd_set_callback(nd, test_rs_done, e) >= 0);
+
+        assert(sd_event_add_time(e, &test_hangcheck, CLOCK_MONOTONIC,
+                                 time_now + 2 *USEC_PER_SEC, 0,
+                                 test_rs_hangcheck, NULL) >= 0);
+
+        assert(sd_icmp6_router_solicitation_start(nd) >= 0);
+
+        sd_event_loop(e);
+
+        test_hangcheck = sd_event_source_unref(test_hangcheck);
+
+        nd = sd_icmp6_nd_unref(nd);
+        assert(!nd);
+
+        close(test_fd[0]);
+        close(test_fd[1]);
+}
+
+int main(int argc, char *argv[]) {
+        sd_event *e;
+
+        assert(sd_event_new(&e) >= 0);
+
+        log_set_max_level(LOG_DEBUG);
+        log_parse_environment();
+        log_open();
+
+        test_rs(e);
+
+        return 0;
+}