test-ndisc-ra: Add Router Advertisement test cases

Add tests for prefix creation, router variable setting and finally
verify that a Router Advertisement is properly formatted when sending.
Also check that there is a Router Advertisment with zero lifetime
when Router Advertisement sending is stopped.

1 files changed, 359 insertions, 0 deletions

diff --git a/src/libsystemd-network/test-ndisc-ra.c b/src/libsystemd-network/test-ndisc-ra.c
new file mode 100644
index 0000000000..6e6d05642d
--- /dev/null
+++ b/src/libsystemd-network/test-ndisc-ra.c
@@ -0,0 +1,359 @@
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2017 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 <arpa/inet.h>
+
+#include "sd-radv.h"
+
+#include "alloc-util.h"
+#include "hexdecoct.h"
+#include "icmp6-util.h"
+#include "socket-util.h"
+#include "strv.h"
+
+static struct ether_addr mac_addr = {
+        .ether_addr_octet = { 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53 }
+};
+
+static uint8_t advertisement[] = {
+        /* ICMPv6 Router Advertisement, no checksum */
+        0x86, 0x00, 0x00, 0x00,  0x40, 0xc0, 0x00, 0xb4,
+        0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+        /* Source Link Layer Address Option */
+        0x01, 0x01, 0x78, 0x2b,  0xcb, 0xb3, 0x6d, 0x53,
+        /* Prefix Information Option */
+        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,
+        /* Prefix Information Option */
+        0x03, 0x04, 0x40, 0xc0,  0x00, 0x27, 0x8d, 0x00,
+        0x00, 0x09, 0x3a, 0x80,  0x00, 0x00, 0x00, 0x00,
+        0x20, 0x01, 0x0d, 0xb8,  0x0b, 0x16, 0xd0, 0x0d,
+        0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+        /* Prefix Information Option */
+        0x03, 0x04, 0x30, 0xc0,  0x00, 0x27, 0x8d, 0x00,
+        0x00, 0x09, 0x3a, 0x80,  0x00, 0x00, 0x00, 0x00,
+        0x20, 0x01, 0x0d, 0xb8,  0xc0, 0x01, 0x0d, 0xad,
+        0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
+        /* Recursive DNS Server Option - not yet supported */
+        0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+        /* DNS Search List Option - not yet supported */
+        0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+        0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
+        0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static sd_event_source *test_hangcheck;
+static bool test_stopped;
+static int test_fd[2];
+static sd_event_source *recv_router_advertisement;
+static struct {
+        struct in6_addr address;
+        unsigned char prefixlen;
+        uint32_t valid;
+        uint32_t preferred;
+        bool succesful;
+} prefix[] = {
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 64,
+          500, 440, true },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 64,
+          /* indicate default valid and preferred lifetimes for the test code */
+          0, 0, true },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 58,
+          0, 0,
+          /* indicate that this prefix already exists */
+          false },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 120,
+          0, 0,
+          /* indicate that this prefix already exists */
+          false },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 12,
+          0, 0,
+          /* indicate that this prefix already exists */
+          false },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x01, 0x0d, 0xad,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 48,
+          0, 0, true },
+        { { { { 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x01, 0x0d, 0xad,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } }, 60,
+          0, 0,
+          /* indicate that this prefix already exists */
+          false },
+};
+
+static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
+                             void *userdata) {
+        assert_se(false);
+
+        return 0;
+}
+
+static void test_radv_prefix(void) {
+        sd_radv_prefix *p;
+
+        printf("* %s\n", __FUNCTION__);
+
+        assert_se(sd_radv_prefix_new(&p) >= 0);
+
+        assert_se(sd_radv_prefix_set_onlink(NULL, true) < 0);
+        assert_se(sd_radv_prefix_set_onlink(p, true) >= 0);
+        assert_se(sd_radv_prefix_set_onlink(p, false) >= 0);
+
+        assert_se(sd_radv_prefix_set_address_autoconfiguration(NULL, true) < 0);
+        assert_se(sd_radv_prefix_set_address_autoconfiguration(p, true) >= 0);
+        assert_se(sd_radv_prefix_set_address_autoconfiguration(p, false) >= 0);
+
+        assert_se(sd_radv_prefix_set_valid_lifetime(NULL, true) < 0);
+        assert_se(sd_radv_prefix_set_valid_lifetime(p, ~0) >= 0);
+        assert_se(sd_radv_prefix_set_valid_lifetime(p, 42) >= 0);
+        assert_se(sd_radv_prefix_set_valid_lifetime(p, 0) >= 0);
+
+        assert_se(sd_radv_prefix_set_preferred_lifetime(NULL, true) < 0);
+        assert_se(sd_radv_prefix_set_preferred_lifetime(p, ~0) >= 0);
+        assert_se(sd_radv_prefix_set_preferred_lifetime(p, 42) >= 0);
+        assert_se(sd_radv_prefix_set_preferred_lifetime(p, 0) >= 0);
+
+        assert_se(sd_radv_prefix_set_prefix(NULL, NULL, 0) < 0);
+        assert_se(sd_radv_prefix_set_prefix(p, NULL, 0) < 0);
+
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 64) >= 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 0) < 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 1) < 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 2) < 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 3) >= 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 125) >= 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 128) >= 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 129) < 0);
+        assert_se(sd_radv_prefix_set_prefix(p, &prefix[0].address, 255) < 0);
+
+        p = sd_radv_prefix_unref(p);
+        assert_se(!p);
+}
+
+static void test_radv(void) {
+        sd_radv *ra;
+
+        printf("* %s\n", __FUNCTION__);
+
+        assert_se(sd_radv_new(&ra) >= 0);
+        assert_se(ra);
+
+        assert_se(sd_radv_set_ifindex(NULL, 0) < 0);
+        assert_se(sd_radv_set_ifindex(ra, 0) >= 0);
+        assert_se(sd_radv_set_ifindex(ra, -1) >= 0);
+        assert_se(sd_radv_set_ifindex(ra, -2) < 0);
+        assert_se(sd_radv_set_ifindex(ra, 42) >= 0);
+
+        assert_se(sd_radv_set_mac(NULL, NULL) < 0);
+        assert_se(sd_radv_set_mac(ra, NULL) >= 0);
+        assert_se(sd_radv_set_mac(ra, &mac_addr) >= 0);
+
+        assert_se(sd_radv_set_mtu(NULL, 0) < 0);
+        assert_se(sd_radv_set_mtu(ra, 0) < 0);
+        assert_se(sd_radv_set_mtu(ra, 1279) < 0);
+        assert_se(sd_radv_set_mtu(ra, 1280) >= 0);
+        assert_se(sd_radv_set_mtu(ra, ~0) >= 0);
+
+        assert_se(sd_radv_set_hop_limit(NULL, 0) < 0);
+        assert_se(sd_radv_set_hop_limit(ra, 0) >= 0);
+        assert_se(sd_radv_set_hop_limit(ra, ~0) >= 0);
+
+        assert_se(sd_radv_set_router_lifetime(NULL, 0) < 0);
+        assert_se(sd_radv_set_router_lifetime(ra, 0) >= 0);
+        assert_se(sd_radv_set_router_lifetime(ra, ~0) >= 0);
+
+        assert_se(sd_radv_set_preference(NULL, 0) < 0);
+        assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_LOW) >= 0);
+        assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_MEDIUM) >= 0);
+        assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_HIGH) >= 0);
+        assert_se(sd_radv_set_preference(ra, ~0) < 0);
+
+        assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_HIGH) >= 0);
+        assert_se(sd_radv_set_router_lifetime(ra, 42000) >= 0);
+        assert_se(sd_radv_set_router_lifetime(ra, 0) < 0);
+        assert_se(sd_radv_set_preference(ra, SD_NDISC_PREFERENCE_MEDIUM) >= 0);
+        assert_se(sd_radv_set_router_lifetime(ra, 0) >= 0);
+
+        assert_se(sd_radv_set_managed_information(NULL, true) < 0);
+        assert_se(sd_radv_set_managed_information(ra, true) >= 0);
+        assert_se(sd_radv_set_managed_information(ra, false) >= 0);
+
+        assert_se(sd_radv_set_other_information(NULL, true) < 0);
+        assert_se(sd_radv_set_other_information(ra, true) >= 0);
+        assert_se(sd_radv_set_other_information(ra, false) >= 0);
+
+        ra = sd_radv_unref(ra);
+        assert_se(!ra);
+}
+
+int icmp6_bind_router_solicitation(int index) {
+        return -ENOSYS;
+}
+
+int icmp6_bind_router_advertisement(int index) {
+        assert_se(index == 42);
+
+        return test_fd[1];
+}
+
+int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
+
+        return 0;
+}
+
+int icmp6_receive(int fd, void *iov_base, size_t iov_len,
+                  struct in6_addr *dst, triple_timestamp *timestamp) {
+        assert_se(read (fd, iov_base, iov_len) == (ssize_t)iov_len);
+
+        if (timestamp)
+                triple_timestamp_get(timestamp);
+
+        return 0;
+}
+
+static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        sd_radv *ra = userdata;
+        unsigned char buf[120];
+        size_t i;
+
+        read(test_fd[0], &buf, sizeof(buf));
+
+        /* router lifetime must be zero when test is stopped */
+        if (test_stopped) {
+                advertisement[6] = 0x00;
+                advertisement[7] = 0x00;
+        }
+
+        printf ("Received Router Advertisement with lifetime %u\n",
+                (advertisement[6] << 8) + advertisement[7]);
+
+        /* test only up to buf size, rest is not yet implemented */
+        for (i = 0; i < sizeof(buf); i++) {
+                printf("0x%02x", buf[i]);
+
+                assert_se(buf[i] == advertisement[i]);
+
+                if ((i + 1) % 8)
+                        printf(", ");
+                else
+                        printf("\n");
+        }
+
+        if (test_stopped) {
+                sd_event *e;
+
+                e = sd_radv_get_event(ra);
+                sd_event_exit(e, 0);
+
+                return 0;
+        }
+
+        assert_se(sd_radv_stop(ra) >= 0);
+        test_stopped = true;
+
+        return 0;
+}
+
+static void test_ra(void) {
+        sd_event *e;
+        sd_radv *ra;
+        usec_t time_now = now(clock_boottime_or_monotonic());
+        unsigned int i;
+
+        printf("* %s\n", __FUNCTION__);
+
+        assert_se(socketpair(AF_UNIX, SOCK_SEQPACKET, 0, test_fd) >= 0);
+
+        assert_se(sd_event_new(&e) >= 0);
+
+        assert_se(sd_radv_new(&ra) >= 0);
+        assert_se(ra);
+
+        assert_se(sd_radv_attach_event(ra, e, 0) >= 0);
+
+        assert_se(sd_radv_set_ifindex(ra, 42) >= 0);
+        assert_se(sd_radv_set_mac(ra, &mac_addr) >= 0);
+        assert_se(sd_radv_set_router_lifetime(ra, 180) >= 0);
+        assert_se(sd_radv_set_hop_limit(ra, 64) >= 0);
+        assert_se(sd_radv_set_managed_information(ra, true) >= 0);
+        assert_se(sd_radv_set_other_information(ra, true) >= 0);
+
+        for (i = 0; i < ELEMENTSOF(prefix); i++) {
+                sd_radv_prefix *p;
+
+                printf("Test prefix %u\n", i);
+                assert_se(sd_radv_prefix_new(&p) >= 0);
+
+                assert_se(sd_radv_prefix_set_prefix(p, &prefix[i].address,
+                                                    prefix[i].prefixlen) >= 0);
+                if (prefix[i].valid)
+                        assert_se(sd_radv_prefix_set_valid_lifetime(p, prefix[i].valid) >= 0);
+                if (prefix[i].preferred)
+                        assert_se(sd_radv_prefix_set_preferred_lifetime(p, prefix[i].preferred) >= 0);
+
+                assert_se((sd_radv_add_prefix(ra, p) >= 0) == prefix[i].succesful);
+                assert_se(sd_radv_add_prefix(ra, p) < 0);
+
+                p = sd_radv_prefix_unref(p);
+                assert_se(!p);
+        }
+
+        assert_se(sd_event_add_io(e, &recv_router_advertisement, test_fd[0],
+                                  EPOLLIN, radv_recv, ra) >= 0);
+
+        assert_se(sd_event_add_time(e, &test_hangcheck, clock_boottime_or_monotonic(),
+                                 time_now + 2 *USEC_PER_SEC, 0,
+                                 test_rs_hangcheck, NULL) >= 0);
+
+        assert_se(sd_radv_start(ra) >= 0);
+
+        sd_event_loop(e);
+
+        test_hangcheck = sd_event_source_unref(test_hangcheck);
+
+        ra = sd_radv_unref(ra);
+        assert_se(!ra);
+
+        close(test_fd[0]);
+
+        sd_event_unref(e);
+}
+
+int main(int argc, char *argv[]) {
+
+        log_set_max_level(LOG_DEBUG);
+        log_parse_environment();
+        log_open();
+
+        test_radv_prefix();
+        test_radv();
+        test_ra();
+
+        printf("* done\n");
+        return 0;
+}