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-rw-r--r--src/libsystemd-network/ndisc-router.c913
1 files changed, 0 insertions, 913 deletions
diff --git a/src/libsystemd-network/ndisc-router.c b/src/libsystemd-network/ndisc-router.c
deleted file mode 100644
index 5162df7..0000000
--- a/src/libsystemd-network/ndisc-router.c
+++ /dev/null
@@ -1,913 +0,0 @@
-/* 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-protocol.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;
-
- if (raw_size > SIZE_MAX - ALIGN(sizeof(sd_ndisc_router)))
- return NULL;
-
- rt = malloc0(ALIGN(sizeof(sd_ndisc_router)) + raw_size);
- if (!rt)
- return NULL;
-
- rt->raw_size = raw_size;
- rt->n_ref = 1;
-
- return rt;
-}
-
-int sd_ndisc_router_get_address(sd_ndisc_router *rt, struct in6_addr *ret) {
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- if (in6_addr_is_null(&rt->address))
- return -ENODATA;
-
- *ret = rt->address;
- return 0;
-}
-
-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;
-}
-
-#define DEFINE_GET_TIMESTAMP(name) \
- int sd_ndisc_router_##name##_timestamp( \
- sd_ndisc_router *rt, \
- clockid_t clock, \
- uint64_t *ret) { \
- \
- usec_t s, t; \
- int r; \
- \
- assert_return(rt, -EINVAL); \
- assert_return(ret, -EINVAL); \
- \
- r = sd_ndisc_router_##name(rt, &s); \
- if (r < 0) \
- return r; \
- \
- r = sd_ndisc_router_get_timestamp(rt, clock, &t); \
- if (r < 0) \
- return r; \
- \
- *ret = time_span_to_stamp(s, t); \
- return 0; \
- }
-
-DEFINE_GET_TIMESTAMP(get_lifetime);
-DEFINE_GET_TIMESTAMP(prefix_get_valid_lifetime);
-DEFINE_GET_TIMESTAMP(prefix_get_preferred_lifetime);
-DEFINE_GET_TIMESTAMP(route_get_lifetime);
-DEFINE_GET_TIMESTAMP(rdnss_get_lifetime);
-DEFINE_GET_TIMESTAMP(dnssl_get_lifetime);
-DEFINE_GET_TIMESTAMP(prefix64_get_lifetime);
-
-int sd_ndisc_router_get_raw(sd_ndisc_router *rt, const void **ret, size_t *ret_size) {
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
- assert_return(ret_size, -EINVAL);
-
- *ret = NDISC_ROUTER_RAW(rt);
- *ret_size = rt->raw_size;
-
- return 0;
-}
-
-static bool pref64_option_verify(const struct nd_opt_prefix64_info *p, size_t length) {
- uint16_t lifetime_and_plc;
-
- assert(p);
-
- if (length != sizeof(struct nd_opt_prefix64_info))
- return false;
-
- lifetime_and_plc = be16toh(p->lifetime_and_plc);
- if (pref64_plc_to_prefix_length(lifetime_and_plc, NULL) < 0)
- return false;
-
- return true;
-}
-
-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 64-bit 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 8 bits */
- rt->lifetime_usec = be16_sec_to_usec(a->nd_ra_router_lifetime, /* max_as_infinity = */ false);
- rt->icmp6_ratelimit_usec = be32_msec_to_usec(a->nd_ra_retransmit, /* max_as_infinity = */ false);
-
- 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;
- case SD_NDISC_OPTION_PREF64: {
- if (!pref64_option_verify((struct nd_opt_prefix64_info *) p, length))
- log_ndisc_errno(nd, SYNTHETIC_ERRNO(EBADMSG),
- "PREF64 prefix has invalid prefix length.");
- break;
- }}
-
- p += length, left -= length;
- }
-
- rt->rindex = sizeof(struct nd_router_advert);
- return 0;
-}
-
-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;
-}
-
-int sd_ndisc_router_get_icmp6_ratelimit(sd_ndisc_router *rt, uint64_t *ret) {
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- *ret = rt->icmp6_ratelimit_usec;
- return 0;
-}
-
-int sd_ndisc_router_get_flags(sd_ndisc_router *rt, uint64_t *ret) {
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- *ret = rt->flags;
- return 0;
-}
-
-int sd_ndisc_router_get_lifetime(sd_ndisc_router *rt, uint64_t *ret) {
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- *ret = rt->lifetime_usec;
- return 0;
-}
-
-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;
-}
-
-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;
-}
-
-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;
-}
-
-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;
-}
-
-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;
-}
-
-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;
-}
-
-int sd_ndisc_router_option_get_raw(sd_ndisc_router *rt, const void **ret, size_t *ret_size) {
- size_t length;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
- assert_return(ret_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;
- *ret_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;
-}
-
-int sd_ndisc_router_prefix_get_valid_lifetime(sd_ndisc_router *rt, uint64_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 = be32_sec_to_usec(ri->nd_opt_pi_valid_time, /* max_as_infinity = */ true);
- return 0;
-}
-
-int sd_ndisc_router_prefix_get_preferred_lifetime(sd_ndisc_router *rt, uint64_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 = be32_sec_to_usec(pi->nd_opt_pi_preferred_time, /* max_as_infinity = */ true);
- return 0;
-}
-
-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;
-}
-
-int sd_ndisc_router_prefix_get_address(sd_ndisc_router *rt, struct in6_addr *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 = pi->nd_opt_pi_prefix;
- return 0;
-}
-
-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;
-}
-
-int sd_ndisc_router_route_get_lifetime(sd_ndisc_router *rt, uint64_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 = unaligned_be32_sec_to_usec(ri + 4, /* max_as_infinity = */ true);
- return 0;
-}
-
-int sd_ndisc_router_route_get_address(sd_ndisc_router *rt, struct in6_addr *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;
-
- zero(*ret);
- memcpy(ret, ri + 8, NDISC_ROUTER_OPTION_LENGTH(rt) - 8);
-
- return 0;
-}
-
-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;
-}
-
-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;
-
- if (!IN_SET((ri[3] >> 3) & 3, SD_NDISC_PREFERENCE_LOW, SD_NDISC_PREFERENCE_MEDIUM, SD_NDISC_PREFERENCE_HIGH))
- return -EOPNOTSUPP;
-
- *ret = (ri[3] >> 3) & 3;
- 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;
-}
-
-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;
-}
-
-int sd_ndisc_router_rdnss_get_lifetime(sd_ndisc_router *rt, uint64_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 = unaligned_be32_sec_to_usec(ri + 4, /* max_as_infinity = */ true);
- 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;
-}
-
-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;
-}
-
-int sd_ndisc_router_dnssl_get_lifetime(sd_ndisc_router *rt, uint64_t *ret) {
- uint8_t *ri;
- int r;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- r = get_dnssl_info(rt, &ri);
- if (r < 0)
- return r;
-
- *ret = unaligned_be32_sec_to_usec(ri + 4, /* max_as_infinity = */ true);
- return 0;
-}
-
-int sd_ndisc_router_captive_portal_get_uri(sd_ndisc_router *rt, const char **ret, size_t *ret_size) {
- int r;
- const char *nd_opt_captive_portal;
- size_t length;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
- assert_return(ret_size, -EINVAL);
-
- r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_CAPTIVE_PORTAL);
- if (r < 0)
- return r;
- if (r == 0)
- return -EMEDIUMTYPE;
-
- r = sd_ndisc_router_option_get_raw(rt, (void *)&nd_opt_captive_portal, &length);
- if (r < 0)
- return r;
-
- /* The length field has units of 8 octets */
- assert(length % 8 == 0);
- if (length == 0)
- return -EBADMSG;
-
- /* Check that the message is not truncated by an embedded NUL.
- * NUL padding to a multiple of 8 is expected. */
- size_t size = strnlen(nd_opt_captive_portal + 2, length - 2);
- if (DIV_ROUND_UP(size + 2, 8) != length / 8)
- return -EBADMSG;
-
- /* Let's not return an empty buffer */
- if (size == 0) {
- *ret = NULL;
- *ret_size = 0;
- return 0;
- }
-
- *ret = nd_opt_captive_portal + 2;
- *ret_size = size;
-
- return 0;
-}
-
-static int get_pref64_prefix_info(sd_ndisc_router *rt, struct nd_opt_prefix64_info **ret) {
- struct nd_opt_prefix64_info *ri;
- size_t length;
- int r;
-
- assert(rt);
- assert(ret);
-
- r = sd_ndisc_router_option_is_type(rt, SD_NDISC_OPTION_PREF64);
- if (r < 0)
- return r;
- if (r == 0)
- return -EMEDIUMTYPE;
-
- length = NDISC_ROUTER_OPTION_LENGTH(rt);
- if (length != sizeof(struct nd_opt_prefix64_info))
- return -EBADMSG;
-
- ri = (struct nd_opt_prefix64_info *) ((uint8_t*) NDISC_ROUTER_RAW(rt) + rt->rindex);
- if (!pref64_option_verify(ri, length))
- return -EBADMSG;
-
- *ret = ri;
- return 0;
-}
-
-int sd_ndisc_router_prefix64_get_prefix(sd_ndisc_router *rt, struct in6_addr *ret) {
- struct nd_opt_prefix64_info *pi;
- struct in6_addr a = {};
- unsigned prefixlen;
- int r;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- r = get_pref64_prefix_info(rt, &pi);
- if (r < 0)
- return r;
-
- r = sd_ndisc_router_prefix64_get_prefixlen(rt, &prefixlen);
- if (r < 0)
- return r;
-
- memcpy(&a, pi->prefix, sizeof(pi->prefix));
- in6_addr_mask(&a, prefixlen);
- /* extra safety check for refusing malformed prefix. */
- if (memcmp(&a, pi->prefix, sizeof(pi->prefix)) != 0)
- return -EBADMSG;
-
- *ret = a;
- return 0;
-}
-
-int sd_ndisc_router_prefix64_get_prefixlen(sd_ndisc_router *rt, unsigned *ret) {
- struct nd_opt_prefix64_info *pi;
- uint16_t lifetime_prefix_len;
- uint8_t prefix_len;
- int r;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- r = get_pref64_prefix_info(rt, &pi);
- if (r < 0)
- return r;
-
- lifetime_prefix_len = be16toh(pi->lifetime_and_plc);
- pref64_plc_to_prefix_length(lifetime_prefix_len, &prefix_len);
-
- *ret = prefix_len;
- return 0;
-}
-
-int sd_ndisc_router_prefix64_get_lifetime(sd_ndisc_router *rt, uint64_t *ret) {
- struct nd_opt_prefix64_info *pi;
- uint16_t lifetime_prefix_len;
- int r;
-
- assert_return(rt, -EINVAL);
- assert_return(ret, -EINVAL);
-
- r = get_pref64_prefix_info(rt, &pi);
- if (r < 0)
- return r;
-
- lifetime_prefix_len = be16toh(pi->lifetime_and_plc);
-
- *ret = (lifetime_prefix_len & PREF64_SCALED_LIFETIME_MASK) * USEC_PER_SEC;
- return 0;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 16:58:31 +0000