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410 lines
13 KiB
C
410 lines
13 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/***
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Copyright © 2014 Intel Corporation. All rights reserved.
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***/
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#include <netinet/icmp6.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include "sd-ndisc.h"
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#include "alloc-util.h"
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#include "hexdecoct.h"
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#include "icmp6-util.h"
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#include "socket-util.h"
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#include "strv.h"
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#include "ndisc-internal.h"
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#include "tests.h"
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static struct ether_addr mac_addr = {
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.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
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};
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static bool verbose = false;
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static sd_event_source *test_hangcheck;
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static int test_fd[2];
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static sd_ndisc *test_timeout_nd;
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typedef int (*send_ra_t)(uint8_t flags);
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static send_ra_t send_ra_function;
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static void router_dump(sd_ndisc_router *rt) {
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struct in6_addr addr;
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uint8_t hop_limit;
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uint64_t t, flags;
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uint32_t mtu;
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uint16_t lifetime;
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unsigned preference;
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int r;
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assert_se(rt);
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log_info("--");
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assert_se(sd_ndisc_router_get_address(rt, &addr) == -ENODATA);
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assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
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log_info("Timestamp: %s", FORMAT_TIMESTAMP(t));
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assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_MONOTONIC, &t) >= 0);
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log_info("Monotonic: %" PRIu64, t);
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if (sd_ndisc_router_get_hop_limit(rt, &hop_limit) < 0)
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log_info("No hop limit set");
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else
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log_info("Hop limit: %u", hop_limit);
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assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
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log_info("Flags: <%s|%s>",
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flags & ND_RA_FLAG_OTHER ? "OTHER" : "",
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flags & ND_RA_FLAG_MANAGED ? "MANAGED" : "");
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assert_se(sd_ndisc_router_get_preference(rt, &preference) >= 0);
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log_info("Preference: %s",
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preference == SD_NDISC_PREFERENCE_LOW ? "low" :
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preference == SD_NDISC_PREFERENCE_HIGH ? "high" : "medium");
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assert_se(sd_ndisc_router_get_lifetime(rt, &lifetime) >= 0);
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log_info("Lifetime: %" PRIu16, lifetime);
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if (sd_ndisc_router_get_mtu(rt, &mtu) < 0)
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log_info("No MTU set");
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else
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log_info("MTU: %" PRIu32, mtu);
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r = sd_ndisc_router_option_rewind(rt);
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for (;;) {
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uint8_t type;
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assert_se(r >= 0);
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if (r == 0)
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break;
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assert_se(sd_ndisc_router_option_get_type(rt, &type) >= 0);
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log_info(">> Option %u", type);
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switch (type) {
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case SD_NDISC_OPTION_SOURCE_LL_ADDRESS:
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case SD_NDISC_OPTION_TARGET_LL_ADDRESS: {
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_cleanup_free_ char *c = NULL;
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const void *p;
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size_t n;
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assert_se(sd_ndisc_router_option_get_raw(rt, &p, &n) >= 0);
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assert_se(n > 2);
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assert_se(c = hexmem((uint8_t*) p + 2, n - 2));
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log_info("Address: %s", c);
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break;
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}
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case SD_NDISC_OPTION_PREFIX_INFORMATION: {
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uint32_t lifetime_valid, lifetime_preferred;
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unsigned prefix_len;
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uint8_t pfl;
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struct in6_addr a;
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char buff[INET6_ADDRSTRLEN];
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assert_se(sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid) >= 0);
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log_info("Valid Lifetime: %" PRIu32, lifetime_valid);
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assert_se(sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred) >= 0);
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log_info("Preferred Lifetime: %" PRIu32, lifetime_preferred);
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assert_se(sd_ndisc_router_prefix_get_flags(rt, &pfl) >= 0);
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log_info("Flags: <%s|%s>",
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pfl & ND_OPT_PI_FLAG_ONLINK ? "ONLINK" : "",
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pfl & ND_OPT_PI_FLAG_AUTO ? "AUTO" : "");
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assert_se(sd_ndisc_router_prefix_get_prefixlen(rt, &prefix_len) >= 0);
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log_info("Prefix Length: %u", prefix_len);
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assert_se(sd_ndisc_router_prefix_get_address(rt, &a) >= 0);
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log_info("Prefix: %s", inet_ntop(AF_INET6, &a, buff, sizeof(buff)));
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break;
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}
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case SD_NDISC_OPTION_RDNSS: {
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const struct in6_addr *a;
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uint32_t lt;
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int n, i;
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n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
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assert_se(n > 0);
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for (i = 0; i < n; i++) {
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char buff[INET6_ADDRSTRLEN];
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log_info("DNS: %s", inet_ntop(AF_INET6, a + i, buff, sizeof(buff)));
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}
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assert_se(sd_ndisc_router_rdnss_get_lifetime(rt, <) >= 0);
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log_info("Lifetime: %" PRIu32, lt);
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break;
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}
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case SD_NDISC_OPTION_DNSSL: {
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_cleanup_strv_free_ char **l = NULL;
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uint32_t lt;
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int n, i;
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n = sd_ndisc_router_dnssl_get_domains(rt, &l);
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assert_se(n > 0);
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for (i = 0; i < n; i++)
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log_info("Domain: %s", l[i]);
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assert_se(sd_ndisc_router_dnssl_get_lifetime(rt, <) >= 0);
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log_info("Lifetime: %" PRIu32, lt);
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break;
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}}
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r = sd_ndisc_router_option_next(rt);
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}
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}
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static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
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void *userdata) {
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assert_se(false);
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return 0;
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}
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int icmp6_bind_router_solicitation(int ifindex) {
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assert_se(ifindex == 42);
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if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
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return -errno;
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return test_fd[0];
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}
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int icmp6_bind_router_advertisement(int ifindex) {
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return -ENOSYS;
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}
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int icmp6_receive(int fd, void *iov_base, size_t iov_len,
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struct in6_addr *dst, triple_timestamp *timestamp) {
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assert_se(read (fd, iov_base, iov_len) == (ssize_t)iov_len);
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if (timestamp)
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triple_timestamp_get(timestamp);
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return 0;
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}
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static int send_ra(uint8_t flags) {
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uint8_t advertisement[] = {
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0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
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0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
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0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
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0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
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0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
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};
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advertisement[5] = flags;
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assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
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sizeof(advertisement));
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if (verbose)
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printf(" sent RA with flag 0x%02x\n", flags);
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return 0;
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}
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int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
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if (!send_ra_function)
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return 0;
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return send_ra_function(0);
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}
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static void test_callback(sd_ndisc *nd, sd_ndisc_event_t event, sd_ndisc_router *rt, void *userdata) {
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sd_event *e = userdata;
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static unsigned idx = 0;
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uint64_t flags_array[] = {
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0,
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0,
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0,
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ND_RA_FLAG_OTHER,
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ND_RA_FLAG_MANAGED
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};
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uint64_t flags;
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uint32_t mtu;
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assert_se(nd);
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if (event != SD_NDISC_EVENT_ROUTER)
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return;
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router_dump(rt);
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assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
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assert_se(flags == flags_array[idx]);
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idx++;
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if (verbose)
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printf(" got event 0x%02" PRIx64 "\n", flags);
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if (idx < ELEMENTSOF(flags_array)) {
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send_ra(flags_array[idx]);
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return;
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}
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assert_se(sd_ndisc_get_mtu(nd, &mtu) == -ENODATA);
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sd_event_exit(e, 0);
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}
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static void test_rs(void) {
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sd_event *e;
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sd_ndisc *nd;
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if (verbose)
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printf("* %s\n", __func__);
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send_ra_function = send_ra;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_ndisc_new(&nd) >= 0);
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assert_se(nd);
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assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
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assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
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assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
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assert_se(sd_ndisc_set_callback(nd, test_callback, e) >= 0);
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assert_se(sd_event_add_time_relative(
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e, &test_hangcheck, clock_boottime_or_monotonic(),
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30 * USEC_PER_SEC, 0,
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test_rs_hangcheck, NULL) >= 0);
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assert_se(sd_ndisc_stop(nd) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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assert_se(sd_ndisc_stop(nd) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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sd_event_loop(e);
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test_hangcheck = sd_event_source_unref(test_hangcheck);
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nd = sd_ndisc_unref(nd);
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assert_se(!nd);
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close(test_fd[1]);
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sd_event_unref(e);
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}
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static int test_timeout_value(uint8_t flags) {
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static int count = 0;
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static usec_t last = 0;
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sd_ndisc *nd = test_timeout_nd;
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usec_t min, max;
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assert_se(nd);
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assert_se(nd->event);
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if (++count >= 20)
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sd_event_exit(nd->event, 0);
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if (last == 0) {
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/* initial RT = IRT + RAND*IRT */
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min = NDISC_ROUTER_SOLICITATION_INTERVAL -
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NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
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max = NDISC_ROUTER_SOLICITATION_INTERVAL +
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NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
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} else {
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/* next RT = 2*RTprev + RAND*RTprev */
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min = 2 * last - last / 10;
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max = 2 * last + last / 10;
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}
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/* final RT > MRT */
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if (last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL) {
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min = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL -
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NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
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max = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL +
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NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
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}
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log_info("backoff timeout interval %2d %s%s <= %s <= %s",
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count,
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last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL ? "(max) ": "",
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FORMAT_TIMESPAN(min, USEC_PER_MSEC),
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FORMAT_TIMESPAN(nd->retransmit_time, USEC_PER_MSEC),
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FORMAT_TIMESPAN(max, USEC_PER_MSEC));
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assert_se(min <= nd->retransmit_time);
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assert_se(max >= nd->retransmit_time);
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last = nd->retransmit_time;
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assert_se(sd_event_source_set_time(nd->timeout_event_source, 0) >= 0);
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return 0;
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}
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static void test_timeout(void) {
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sd_event *e;
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sd_ndisc *nd;
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if (verbose)
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printf("* %s\n", __func__);
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send_ra_function = test_timeout_value;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_ndisc_new(&nd) >= 0);
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assert_se(nd);
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test_timeout_nd = nd;
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assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
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assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
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assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
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assert_se(sd_event_add_time_relative(
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e, &test_hangcheck, clock_boottime_or_monotonic(),
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30 * USEC_PER_SEC, 0,
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test_rs_hangcheck, NULL) >= 0);
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assert_se(sd_ndisc_start(nd) >= 0);
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sd_event_loop(e);
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test_hangcheck = sd_event_source_unref(test_hangcheck);
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nd = sd_ndisc_unref(nd);
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sd_event_unref(e);
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}
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int main(int argc, char *argv[]) {
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test_setup_logging(LOG_DEBUG);
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test_rs();
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test_timeout();
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return 0;
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}
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