/* SPDX-License-Identifier: LGPL-2.1-or-later */ /*** Copyright © 2014 Intel Corporation. All rights reserved. ***/ #include #include #include #include "sd-ndisc.h" #include "alloc-util.h" #include "fd-util.h" #include "hexdecoct.h" #include "icmp6-packet.h" #include "icmp6-test-util.h" #include "socket-util.h" #include "strv.h" #include "ndisc-internal.h" #include "tests.h" static struct ether_addr mac_addr = { .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'} }; static bool verbose = false; static void router_dump(sd_ndisc_router *rt) { struct in6_addr addr; uint8_t hop_limit; usec_t t, lifetime, retrans_time; uint64_t flags; uint32_t mtu; uint8_t preference; int r; assert_se(rt); log_info("--"); assert_se(sd_ndisc_router_get_sender_address(rt, &addr) >= 0); log_info("Sender: %s", IN6_ADDR_TO_STRING(&addr)); assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Timestamp: %s", FORMAT_TIMESTAMP(t)); assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_MONOTONIC, &t) >= 0); log_info("Monotonic: %" PRIu64, t); if (sd_ndisc_router_get_hop_limit(rt, &hop_limit) < 0) log_info("No hop limit set"); else log_info("Hop limit: %u", hop_limit); assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0); log_info("Flags: <%s|%s>", flags & ND_RA_FLAG_OTHER ? "OTHER" : "", flags & ND_RA_FLAG_MANAGED ? "MANAGED" : ""); assert_se(sd_ndisc_router_get_preference(rt, &preference) >= 0); log_info("Preference: %s", preference == SD_NDISC_PREFERENCE_LOW ? "low" : preference == SD_NDISC_PREFERENCE_HIGH ? "high" : "medium"); assert_se(sd_ndisc_router_get_lifetime(rt, &lifetime) >= 0); assert_se(sd_ndisc_router_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t)); assert_se(sd_ndisc_router_get_retransmission_time(rt, &retrans_time) >= 0); log_info("Retransmission Time: %s", FORMAT_TIMESPAN(retrans_time, USEC_PER_SEC)); if (sd_ndisc_router_get_mtu(rt, &mtu) < 0) log_info("No MTU set"); else log_info("MTU: %" PRIu32, mtu); r = sd_ndisc_router_option_rewind(rt); for (;;) { uint8_t type; assert_se(r >= 0); if (r == 0) break; assert_se(sd_ndisc_router_option_get_type(rt, &type) >= 0); log_info(">> Option %u", type); switch (type) { case SD_NDISC_OPTION_SOURCE_LL_ADDRESS: case SD_NDISC_OPTION_TARGET_LL_ADDRESS: { _cleanup_free_ char *c = NULL; const uint8_t *p; size_t n; assert_se(sd_ndisc_router_option_get_raw(rt, &p, &n) >= 0); assert_se(n > 2); assert_se(c = hexmem(p + 2, n - 2)); log_info("Address: %s", c); break; } case SD_NDISC_OPTION_PREFIX_INFORMATION: { uint8_t prefix_len, pfl; struct in6_addr a; assert_se(sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime) >= 0); assert_se(sd_ndisc_router_prefix_get_valid_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Valid Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t)); assert_se(sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime) >= 0); assert_se(sd_ndisc_router_prefix_get_preferred_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Preferred Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t)); assert_se(sd_ndisc_router_prefix_get_flags(rt, &pfl) >= 0); log_info("Flags: <%s|%s>", pfl & ND_OPT_PI_FLAG_ONLINK ? "ONLINK" : "", pfl & ND_OPT_PI_FLAG_AUTO ? "AUTO" : ""); assert_se(sd_ndisc_router_prefix_get_prefixlen(rt, &prefix_len) >= 0); log_info("Prefix Length: %u", prefix_len); assert_se(sd_ndisc_router_prefix_get_address(rt, &a) >= 0); log_info("Prefix: %s", IN6_ADDR_TO_STRING(&a)); break; } case SD_NDISC_OPTION_RDNSS: { const struct in6_addr *a; int n, i; n = sd_ndisc_router_rdnss_get_addresses(rt, &a); assert_se(n > 0); for (i = 0; i < n; i++) log_info("DNS: %s", IN6_ADDR_TO_STRING(a + i)); assert_se(sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime) >= 0); assert_se(sd_ndisc_router_rdnss_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t)); break; } case SD_NDISC_OPTION_DNSSL: { char **l; assert_se(sd_ndisc_router_dnssl_get_domains(rt, &l) >= 0); STRV_FOREACH(s, l) log_info("Domain: %s", *s); assert_se(sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime) >= 0); assert_se(sd_ndisc_router_dnssl_get_lifetime_timestamp(rt, CLOCK_REALTIME, &t) >= 0); log_info("Lifetime: %s (%s)", FORMAT_TIMESPAN(lifetime, USEC_PER_SEC), FORMAT_TIMESTAMP(t)); break; }} r = sd_ndisc_router_option_next(rt); } } static int send_ra(uint8_t flags) { uint8_t advertisement[] = { /* struct nd_router_advert */ 0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* type = 0x03 (SD_NDISC_OPTION_PREFIX_INFORMATION), length = 32 */ 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, /* type = 0x19 (SD_NDISC_OPTION_RDNSS), length = 24 */ 0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, /* type = 0x1f (SD_NDISC_OPTION_DNSSL), length = 24 */ 0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74, 0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* type = 0x01 (SD_NDISC_OPTION_SOURCE_LL_ADDRESS), length = 8 */ 0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53, }; advertisement[5] = flags; assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) == sizeof(advertisement)); if (verbose) printf(" sent RA with flag 0x%02x\n", flags); return 0; } static void test_callback_ra(sd_ndisc *nd, sd_ndisc_event_t event, void *message, void *userdata) { sd_event *e = userdata; static unsigned idx = 0; uint64_t flags_array[] = { 0, 0, 0, ND_RA_FLAG_OTHER, ND_RA_FLAG_MANAGED }; uint64_t flags; assert_se(nd); if (event != SD_NDISC_EVENT_ROUTER) return; sd_ndisc_router *rt = ASSERT_PTR(message); router_dump(rt); assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0); assert_se(flags == flags_array[idx]); idx++; if (verbose) printf(" got event 0x%02" PRIx64 "\n", flags); if (idx < ELEMENTSOF(flags_array)) { send_ra(flags_array[idx]); return; } idx = 0; sd_event_exit(e, 0); } static int on_recv_rs(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; assert_se(icmp6_packet_receive(fd, &packet) >= 0); return send_ra(0); } TEST(rs) { _cleanup_(sd_event_unrefp) sd_event *e = NULL; _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL; assert_se(sd_event_new(&e) >= 0); assert_se(sd_ndisc_new(&nd) >= 0); assert_se(nd); assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0); assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0); assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0); assert_se(sd_ndisc_set_callback(nd, test_callback_ra, e) >= 0); assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME, 30 * USEC_PER_SEC, 0, NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0); assert_se(sd_ndisc_stop(nd) >= 0); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_ndisc_stop(nd) >= 0); test_fd[1] = safe_close(test_fd[1]); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs, nd) >= 0); assert_se(sd_event_source_set_io_fd_own(s, true) >= 0); assert_se(sd_event_loop(e) >= 0); test_fd[1] = -EBADF; } static int send_ra_invalid_domain(uint8_t flags) { uint8_t advertisement[] = { /* struct nd_router_advert */ 0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* type = 0x03 (SD_NDISC_OPTION_PREFIX_INFORMATION), length = 32 */ 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, /* type = 0x19 (SD_NDISC_OPTION_RDNSS), length = 24 */ 0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, /* type = 0x1f (SD_NDISC_OPTION_DNSSL), length = 112 */ 0x1f, 0x0e, 0xee, 0x68, 0xb0, 0xf4, 0x36, 0x39, 0x2c, 0xbc, 0x0b, 0xbc, 0xa9, 0x97, 0x71, 0x37, 0xad, 0x86, 0x80, 0x14, 0x2e, 0x58, 0xaa, 0x8a, 0xb7, 0xa1, 0xbe, 0x91, 0x59, 0x00, 0xc4, 0xe8, 0xdd, 0xd8, 0x6d, 0xe5, 0x4a, 0x7a, 0x71, 0x42, 0x74, 0x45, 0x9e, 0x2e, 0xfd, 0x9d, 0x71, 0x1d, 0xd0, 0xc0, 0x54, 0x0c, 0x4d, 0x1f, 0xbf, 0x90, 0xd9, 0x79, 0x58, 0xc0, 0x1d, 0xa3, 0x39, 0xcf, 0xb8, 0xec, 0xd2, 0xe4, 0xcd, 0xb6, 0x13, 0x2f, 0xc0, 0x46, 0xe8, 0x07, 0x3f, 0xaa, 0x28, 0xa5, 0x23, 0xf1, 0xf0, 0xca, 0xd3, 0x19, 0x3f, 0xfa, 0x6c, 0x7c, 0xec, 0x1b, 0xcf, 0x71, 0xeb, 0xba, 0x68, 0x1b, 0x8e, 0x7d, 0x93, 0x7e, 0x0b, 0x9f, 0xdb, 0x12, 0x9c, 0x75, 0x22, 0x5f, 0x12, 0x00, /* type = 0x01 (SD_NDISC_OPTION_SOURCE_LL_ADDRESS), length = 8 */ 0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53, }; advertisement[5] = flags; printf("sizeof(nd_router_advert)=%zu\n", sizeof(struct nd_router_advert)); assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) == sizeof(advertisement)); if (verbose) printf(" sent RA with flag 0x%02x\n", flags); return 0; } static int on_recv_rs_invalid_domain(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; assert_se(icmp6_packet_receive(fd, &packet) >= 0); return send_ra_invalid_domain(0); } TEST(invalid_domain) { _cleanup_(sd_event_unrefp) sd_event *e = NULL; _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL; assert_se(sd_event_new(&e) >= 0); assert_se(sd_ndisc_new(&nd) >= 0); assert_se(nd); assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0); assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0); assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0); assert_se(sd_ndisc_set_callback(nd, test_callback_ra, e) >= 0); assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME, 30 * USEC_PER_SEC, 0, NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs_invalid_domain, nd) >= 0); assert_se(sd_event_source_set_io_fd_own(s, true) >= 0); assert_se(sd_event_loop(e) >= 0); test_fd[1] = -EBADF; } static void neighbor_dump(sd_ndisc_neighbor *na) { struct in6_addr addr; uint32_t flags; assert_se(na); log_info("--"); assert_se(sd_ndisc_neighbor_get_sender_address(na, &addr) >= 0); log_info("Sender: %s", IN6_ADDR_TO_STRING(&addr)); assert_se(sd_ndisc_neighbor_get_flags(na, &flags) >= 0); log_info("Flags: Router:%s, Solicited:%s, Override: %s", yes_no(flags & ND_NA_FLAG_ROUTER), yes_no(flags & ND_NA_FLAG_SOLICITED), yes_no(flags & ND_NA_FLAG_OVERRIDE)); assert_se(sd_ndisc_neighbor_is_router(na) == FLAGS_SET(flags, ND_NA_FLAG_ROUTER)); assert_se(sd_ndisc_neighbor_is_solicited(na) == FLAGS_SET(flags, ND_NA_FLAG_SOLICITED)); assert_se(sd_ndisc_neighbor_is_override(na) == FLAGS_SET(flags, ND_NA_FLAG_OVERRIDE)); } static int send_na(uint32_t flags) { uint8_t advertisement[] = { /* struct nd_neighbor_advert */ 0x88, 0x00, 0xde, 0x83, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, /* type = 0x02 (SD_NDISC_OPTION_TARGET_LL_ADDRESS), length = 8 */ 0x01, 0x01, 'A', 'B', 'C', '1', '2', '3', }; ((struct nd_neighbor_advert*) advertisement)->nd_na_flags_reserved = flags; assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) == sizeof(advertisement)); if (verbose) printf(" sent NA with flag 0x%02x\n", flags); return 0; } static void test_callback_na(sd_ndisc *nd, sd_ndisc_event_t event, void *message, void *userdata) { sd_event *e = userdata; static unsigned idx = 0; uint32_t flags_array[] = { 0, 0, ND_NA_FLAG_ROUTER, ND_NA_FLAG_SOLICITED, ND_NA_FLAG_SOLICITED | ND_NA_FLAG_OVERRIDE, }; uint32_t flags; assert_se(nd); if (event != SD_NDISC_EVENT_NEIGHBOR) return; sd_ndisc_neighbor *rt = ASSERT_PTR(message); neighbor_dump(rt); assert_se(sd_ndisc_neighbor_get_flags(rt, &flags) >= 0); assert_se(flags == flags_array[idx]); idx++; if (verbose) printf(" got event 0x%02" PRIx32 "\n", flags); if (idx < ELEMENTSOF(flags_array)) { send_na(flags_array[idx]); return; } idx = 0; sd_event_exit(e, 0); } static int on_recv_rs_na(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; assert_se(icmp6_packet_receive(fd, &packet) >= 0); return send_na(0); } TEST(na) { _cleanup_(sd_event_unrefp) sd_event *e = NULL; _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL; assert_se(sd_event_new(&e) >= 0); assert_se(sd_ndisc_new(&nd) >= 0); assert_se(nd); assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0); assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0); assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0); assert_se(sd_ndisc_set_callback(nd, test_callback_na, e) >= 0); assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME, 30 * USEC_PER_SEC, 0, NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs_na, nd) >= 0); assert_se(sd_event_source_set_io_fd_own(s, true) >= 0); assert_se(sd_event_loop(e) >= 0); test_fd[1] = -EBADF; } static int on_recv_rs_timeout(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_(icmp6_packet_unrefp) ICMP6Packet *packet = NULL; sd_ndisc *nd = ASSERT_PTR(userdata); static int count = 0; static usec_t last = 0; usec_t min, max; assert_se(icmp6_packet_receive(fd, &packet) >= 0); if (++count >= 20) sd_event_exit(nd->event, 0); if (last == 0) { /* initial RT = IRT + RAND*IRT */ min = NDISC_ROUTER_SOLICITATION_INTERVAL - NDISC_ROUTER_SOLICITATION_INTERVAL / 10; max = NDISC_ROUTER_SOLICITATION_INTERVAL + NDISC_ROUTER_SOLICITATION_INTERVAL / 10; } else { /* next RT = 2*RTprev + RAND*RTprev */ min = 2 * last - last / 10; max = 2 * last + last / 10; } /* final RT > MRT */ if (last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL) { min = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL - NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10; max = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL + NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10; } log_info("backoff timeout interval %2d %s%s <= %s <= %s", count, last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL ? "(max) ": "", FORMAT_TIMESPAN(min, USEC_PER_MSEC), FORMAT_TIMESPAN(nd->retransmit_time, USEC_PER_MSEC), FORMAT_TIMESPAN(max, USEC_PER_MSEC)); assert_se(min <= nd->retransmit_time); assert_se(max >= nd->retransmit_time); last = nd->retransmit_time; assert_se(sd_event_source_set_time(nd->timeout_event_source, 0) >= 0); return 0; } TEST(timeout) { _cleanup_(sd_event_unrefp) sd_event *e = NULL; _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL; assert_se(sd_event_new(&e) >= 0); assert_se(sd_ndisc_new(&nd) >= 0); assert_se(nd); assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0); assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0); assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0); assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME, 30 * USEC_PER_SEC, 0, NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0); assert_se(sd_ndisc_start(nd) >= 0); assert_se(sd_event_add_io(e, &s, test_fd[1], EPOLLIN, on_recv_rs_timeout, nd) >= 0); assert_se(sd_event_source_set_io_fd_own(s, true) >= 0); assert_se(sd_event_loop(e) >= 0); test_fd[1] = -EBADF; } DEFINE_TEST_MAIN(LOG_DEBUG);