| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| /*** |
| Copyright © 2014 Intel Corporation. All rights reserved. |
| ***/ |
| |
| #include <netinet/icmp6.h> |
| |
| #include "sd-ndisc.h" |
| |
| #include "alloc-util.h" |
| #include "dns-domain.h" |
| #include "hostname-util.h" |
| #include "memory-util.h" |
| #include "missing_network.h" |
| #include "ndisc-internal.h" |
| #include "ndisc-router.h" |
| #include "strv.h" |
| |
| DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_ndisc_router, sd_ndisc_router, mfree); |
| |
| sd_ndisc_router *ndisc_router_new(size_t raw_size) { |
| sd_ndisc_router *rt; |
| |
| rt = malloc0(ALIGN(sizeof(sd_ndisc_router)) + raw_size); |
| if (!rt) |
| return NULL; |
| |
| rt->raw_size = raw_size; |
| rt->n_ref = 1; |
| |
| return rt; |
| } |
| |
| _public_ int sd_ndisc_router_from_raw(sd_ndisc_router **ret, const void *raw, size_t raw_size) { |
| _cleanup_(sd_ndisc_router_unrefp) sd_ndisc_router *rt = NULL; |
| int r; |
| |
| assert_return(ret, -EINVAL); |
| assert_return(raw || raw_size <= 0, -EINVAL); |
| |
| rt = ndisc_router_new(raw_size); |
| if (!rt) |
| return -ENOMEM; |
| |
| memcpy(NDISC_ROUTER_RAW(rt), raw, raw_size); |
| r = ndisc_router_parse(NULL, rt); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(rt); |
| |
| return r; |
| } |
| |
| _public_ int sd_ndisc_router_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret_addr, -EINVAL); |
| |
| if (in6_addr_is_null(&rt->address)) |
| return -ENODATA; |
| |
| *ret_addr = rt->address; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_timestamp(sd_ndisc_router *rt, clockid_t clock, uint64_t *ret) { |
| assert_return(rt, -EINVAL); |
| assert_return(TRIPLE_TIMESTAMP_HAS_CLOCK(clock), -EOPNOTSUPP); |
| assert_return(clock_supported(clock), -EOPNOTSUPP); |
| assert_return(ret, -EINVAL); |
| |
| if (!triple_timestamp_is_set(&rt->timestamp)) |
| return -ENODATA; |
| |
| *ret = triple_timestamp_by_clock(&rt->timestamp, clock); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_raw(sd_ndisc_router *rt, const void **ret, size_t *size) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| assert_return(size, -EINVAL); |
| |
| *ret = NDISC_ROUTER_RAW(rt); |
| *size = rt->raw_size; |
| |
| return 0; |
| } |
| |
| int ndisc_router_parse(sd_ndisc *nd, sd_ndisc_router *rt) { |
| struct nd_router_advert *a; |
| const uint8_t *p; |
| bool has_mtu = false, has_flag_extension = false; |
| size_t left; |
| |
| assert(rt); |
| |
| if (rt->raw_size < sizeof(struct nd_router_advert)) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Too small to be a router advertisement, ignoring."); |
| |
| /* Router advertisement packets are neatly aligned to 64bit boundaries, hence we can access them directly */ |
| a = NDISC_ROUTER_RAW(rt); |
| |
| if (a->nd_ra_type != ND_ROUTER_ADVERT) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Received ND packet that is not a router advertisement, ignoring."); |
| |
| if (a->nd_ra_code != 0) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Received ND packet with wrong RA code, ignoring."); |
| |
| rt->hop_limit = a->nd_ra_curhoplimit; |
| rt->flags = a->nd_ra_flags_reserved; /* the first 8bit */ |
| rt->lifetime = be16toh(a->nd_ra_router_lifetime); |
| |
| rt->preference = (rt->flags >> 3) & 3; |
| if (!IN_SET(rt->preference, SD_NDISC_PREFERENCE_LOW, SD_NDISC_PREFERENCE_HIGH)) |
| rt->preference = SD_NDISC_PREFERENCE_MEDIUM; |
| |
| p = (const uint8_t*) NDISC_ROUTER_RAW(rt) + sizeof(struct nd_router_advert); |
| left = rt->raw_size - sizeof(struct nd_router_advert); |
| |
| for (;;) { |
| uint8_t type; |
| size_t length; |
| |
| if (left == 0) |
| break; |
| |
| if (left < 2) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Option lacks header, ignoring datagram."); |
| |
| type = p[0]; |
| length = p[1] * 8; |
| |
| if (length == 0) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Zero-length option, ignoring datagram."); |
| if (left < length) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Option truncated, ignoring datagram."); |
| |
| switch (type) { |
| |
| case SD_NDISC_OPTION_PREFIX_INFORMATION: |
| |
| if (length != 4*8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Prefix option of invalid size, ignoring datagram."); |
| |
| if (p[2] > 128) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Bad prefix length, ignoring datagram."); |
| |
| break; |
| |
| case SD_NDISC_OPTION_MTU: { |
| uint32_t m; |
| |
| if (has_mtu) { |
| log_ndisc(nd, "MTU option specified twice, ignoring."); |
| break; |
| } |
| |
| if (length != 8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "MTU option of invalid size, ignoring datagram."); |
| |
| m = be32toh(*(uint32_t*) (p + 4)); |
| if (m >= IPV6_MIN_MTU) /* ignore invalidly small MTUs */ |
| rt->mtu = m; |
| |
| has_mtu = true; |
| break; |
| } |
| |
| case SD_NDISC_OPTION_ROUTE_INFORMATION: |
| if (length < 1*8 || length > 3*8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Route information option of invalid size, ignoring datagram."); |
| |
| if (p[2] > 128) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Bad route prefix length, ignoring datagram."); |
| |
| break; |
| |
| case SD_NDISC_OPTION_RDNSS: |
| if (length < 3*8 || (length % (2*8)) != 1*8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), "RDNSS option has invalid size."); |
| |
| break; |
| |
| case SD_NDISC_OPTION_FLAGS_EXTENSION: |
| |
| if (has_flag_extension) { |
| log_ndisc(nd, "Flags extension option specified twice, ignoring."); |
| break; |
| } |
| |
| if (length < 1*8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "Flags extension option has invalid size."); |
| |
| /* Add in the additional flags bits */ |
| rt->flags |= |
| ((uint64_t) p[2] << 8) | |
| ((uint64_t) p[3] << 16) | |
| ((uint64_t) p[4] << 24) | |
| ((uint64_t) p[5] << 32) | |
| ((uint64_t) p[6] << 40) | |
| ((uint64_t) p[7] << 48); |
| |
| has_flag_extension = true; |
| break; |
| |
| case SD_NDISC_OPTION_DNSSL: |
| if (length < 2*8) |
| return log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG), |
| "DNSSL option has invalid size."); |
| |
| break; |
| } |
| |
| p += length, left -= length; |
| } |
| |
| rt->rindex = sizeof(struct nd_router_advert); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_hop_limit(sd_ndisc_router *rt, uint8_t *ret) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| *ret = rt->hop_limit; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_flags(sd_ndisc_router *rt, uint64_t *ret_flags) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret_flags, -EINVAL); |
| |
| *ret_flags = rt->flags; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_lifetime(sd_ndisc_router *rt, uint16_t *ret_lifetime) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret_lifetime, -EINVAL); |
| |
| *ret_lifetime = rt->lifetime; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_preference(sd_ndisc_router *rt, unsigned *ret) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| *ret = rt->preference; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_get_mtu(sd_ndisc_router *rt, uint32_t *ret) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| if (rt->mtu <= 0) |
| return -ENODATA; |
| |
| *ret = rt->mtu; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_option_rewind(sd_ndisc_router *rt) { |
| assert_return(rt, -EINVAL); |
| |
| assert(rt->raw_size >= sizeof(struct nd_router_advert)); |
| rt->rindex = sizeof(struct nd_router_advert); |
| |
| return rt->rindex < rt->raw_size; |
| } |
| |
| _public_ int sd_ndisc_router_option_next(sd_ndisc_router *rt) { |
| size_t length; |
| |
| assert_return(rt, -EINVAL); |
| |
| if (rt->rindex == rt->raw_size) /* EOF */ |
| return -ESPIPE; |
| |
| if (rt->rindex + 2 > rt->raw_size) /* Truncated message */ |
| return -EBADMSG; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (rt->rindex + length > rt->raw_size) |
| return -EBADMSG; |
| |
| rt->rindex += length; |
| return rt->rindex < rt->raw_size; |
| } |
| |
| _public_ int sd_ndisc_router_option_get_type(sd_ndisc_router *rt, uint8_t *ret) { |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| if (rt->rindex == rt->raw_size) /* EOF */ |
| return -ESPIPE; |
| |
| if (rt->rindex + 2 > rt->raw_size) /* Truncated message */ |
| return -EBADMSG; |
| |
| *ret = NDISC_ROUTER_OPTION_TYPE(rt); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_option_is_type(sd_ndisc_router *rt, uint8_t type) { |
| uint8_t k; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| |
| r = sd_ndisc_router_option_get_type(rt, &k); |
| if (r < 0) |
| return r; |
| |
| return type == k; |
| } |
| |
| _public_ int sd_ndisc_router_option_get_raw(sd_ndisc_router *rt, const void **ret, size_t *size) { |
| size_t length; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| assert_return(size, -EINVAL); |
| |
| /* Note that this returns the full option, including the option header */ |
| |
| if (rt->rindex + 2 > rt->raw_size) |
| return -EBADMSG; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (rt->rindex + length > rt->raw_size) |
| return -EBADMSG; |
| |
| *ret = (uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex; |
| *size = length; |
| |
| return 0; |
| } |
| |
| static int get_prefix_info(sd_ndisc_router *rt, struct nd_opt_prefix_info **ret) { |
| struct nd_opt_prefix_info *ri; |
| size_t length; |
| int r; |
| |
| assert(rt); |
| assert(ret); |
| |
| r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_PREFIX_INFORMATION); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EMEDIUMTYPE; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (length != sizeof(struct nd_opt_prefix_info)) |
| return -EBADMSG; |
| |
| ri = (struct nd_opt_prefix_info*) ((uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex); |
| if (ri->nd_opt_pi_prefix_len > 128) |
| return -EBADMSG; |
| |
| *ret = ri; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_prefix_get_valid_lifetime(sd_ndisc_router *rt, uint32_t *ret) { |
| struct nd_opt_prefix_info *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_prefix_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = be32toh(ri->nd_opt_pi_valid_time); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_prefix_get_preferred_lifetime(sd_ndisc_router *rt, uint32_t *ret) { |
| struct nd_opt_prefix_info *pi; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_prefix_info(rt, &pi); |
| if (r < 0) |
| return r; |
| |
| *ret = be32toh(pi->nd_opt_pi_preferred_time); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_prefix_get_flags(sd_ndisc_router *rt, uint8_t *ret) { |
| struct nd_opt_prefix_info *pi; |
| uint8_t flags; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_prefix_info(rt, &pi); |
| if (r < 0) |
| return r; |
| |
| flags = pi->nd_opt_pi_flags_reserved; |
| |
| if ((flags & ND_OPT_PI_FLAG_AUTO) && (pi->nd_opt_pi_prefix_len != 64)) { |
| log_ndisc(NULL, "Invalid prefix length, ignoring prefix for stateless autoconfiguration."); |
| flags &= ~ND_OPT_PI_FLAG_AUTO; |
| } |
| |
| *ret = flags; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_prefix_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr) { |
| struct nd_opt_prefix_info *pi; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret_addr, -EINVAL); |
| |
| r = get_prefix_info(rt, &pi); |
| if (r < 0) |
| return r; |
| |
| *ret_addr = pi->nd_opt_pi_prefix; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_prefix_get_prefixlen(sd_ndisc_router *rt, unsigned *ret) { |
| struct nd_opt_prefix_info *pi; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_prefix_info(rt, &pi); |
| if (r < 0) |
| return r; |
| |
| if (pi->nd_opt_pi_prefix_len > 128) |
| return -EBADMSG; |
| |
| *ret = pi->nd_opt_pi_prefix_len; |
| return 0; |
| } |
| |
| static int get_route_info(sd_ndisc_router *rt, uint8_t **ret) { |
| uint8_t *ri; |
| size_t length; |
| int r; |
| |
| assert(rt); |
| assert(ret); |
| |
| r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_ROUTE_INFORMATION); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EMEDIUMTYPE; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (length < 1*8 || length > 3*8) |
| return -EBADMSG; |
| |
| ri = (uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex; |
| |
| if (ri[2] > 128) |
| return -EBADMSG; |
| |
| *ret = ri; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_route_get_lifetime(sd_ndisc_router *rt, uint32_t *ret) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_route_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = be32toh(*(uint32_t*) (ri + 4)); |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_route_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret_addr, -EINVAL); |
| |
| r = get_route_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| zero(*ret_addr); |
| memcpy(ret_addr, ri + 8, NDISC_ROUTER_OPTION_LENGTH(rt) - 8); |
| |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_route_get_prefixlen(sd_ndisc_router *rt, unsigned *ret) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_route_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = ri[2]; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_route_get_preference(sd_ndisc_router *rt, unsigned *ret) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_route_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = (ri[3] >> 3) & 3; |
| if (!IN_SET(*ret, SD_NDISC_PREFERENCE_LOW, SD_NDISC_PREFERENCE_HIGH)) |
| *ret = SD_NDISC_PREFERENCE_MEDIUM; |
| |
| return 0; |
| } |
| |
| static int get_rdnss_info(sd_ndisc_router *rt, uint8_t **ret) { |
| size_t length; |
| int r; |
| |
| assert(rt); |
| assert(ret); |
| |
| r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_RDNSS); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EMEDIUMTYPE; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (length < 3*8 || (length % (2*8)) != 1*8) |
| return -EBADMSG; |
| |
| *ret = (uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_rdnss_get_addresses(sd_ndisc_router *rt, const struct in6_addr **ret) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_rdnss_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = (const struct in6_addr*) (ri + 8); |
| return (NDISC_ROUTER_OPTION_LENGTH(rt) - 8) / 16; |
| } |
| |
| _public_ int sd_ndisc_router_rdnss_get_lifetime(sd_ndisc_router *rt, uint32_t *ret) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_rdnss_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret = be32toh(*(uint32_t*) (ri + 4)); |
| return 0; |
| } |
| |
| static int get_dnssl_info(sd_ndisc_router *rt, uint8_t **ret) { |
| size_t length; |
| int r; |
| |
| assert(rt); |
| assert(ret); |
| |
| r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_DNSSL); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EMEDIUMTYPE; |
| |
| length = NDISC_ROUTER_OPTION_LENGTH(rt); |
| if (length < 2*8) |
| return -EBADMSG; |
| |
| *ret = (uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex; |
| return 0; |
| } |
| |
| _public_ int sd_ndisc_router_dnssl_get_domains(sd_ndisc_router *rt, char ***ret) { |
| _cleanup_strv_free_ char **l = NULL; |
| _cleanup_free_ char *e = NULL; |
| size_t n = 0, left; |
| uint8_t *ri, *p; |
| bool first = true; |
| int r; |
| unsigned k = 0; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret, -EINVAL); |
| |
| r = get_dnssl_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| p = ri + 8; |
| left = NDISC_ROUTER_OPTION_LENGTH(rt) - 8; |
| |
| for (;;) { |
| if (left == 0) { |
| |
| if (n > 0) /* Not properly NUL terminated */ |
| return -EBADMSG; |
| |
| break; |
| } |
| |
| if (*p == 0) { |
| /* Found NUL termination */ |
| |
| if (n > 0) { |
| _cleanup_free_ char *normalized = NULL; |
| |
| e[n] = 0; |
| r = dns_name_normalize(e, 0, &normalized); |
| if (r < 0) |
| return r; |
| |
| /* Ignore the root domain name or "localhost" and friends */ |
| if (!is_localhost(normalized) && |
| !dns_name_is_root(normalized)) { |
| |
| if (strv_push(&l, normalized) < 0) |
| return -ENOMEM; |
| |
| normalized = NULL; |
| k++; |
| } |
| } |
| |
| n = 0; |
| first = true; |
| p++, left--; |
| continue; |
| } |
| |
| /* Check for compression (which is not allowed) */ |
| if (*p > 63) |
| return -EBADMSG; |
| |
| if (1U + *p + 1U > left) |
| return -EBADMSG; |
| |
| if (!GREEDY_REALLOC(e, n + !first + DNS_LABEL_ESCAPED_MAX + 1U)) |
| return -ENOMEM; |
| |
| if (first) |
| first = false; |
| else |
| e[n++] = '.'; |
| |
| r = dns_label_escape((char*) p+1, *p, e + n, DNS_LABEL_ESCAPED_MAX); |
| if (r < 0) |
| return r; |
| |
| n += r; |
| |
| left -= 1 + *p; |
| p += 1 + *p; |
| } |
| |
| if (strv_isempty(l)) { |
| *ret = NULL; |
| return 0; |
| } |
| |
| *ret = TAKE_PTR(l); |
| |
| return k; |
| } |
| |
| _public_ int sd_ndisc_router_dnssl_get_lifetime(sd_ndisc_router *rt, uint32_t *ret_sec) { |
| uint8_t *ri; |
| int r; |
| |
| assert_return(rt, -EINVAL); |
| assert_return(ret_sec, -EINVAL); |
| |
| r = get_dnssl_info(rt, &ri); |
| if (r < 0) |
| return r; |
| |
| *ret_sec = be32toh(*(uint32_t*) (ri + 4)); |
| return 0; |
| } |
