Merge pull request #3394 from poettering/triple-tstamp

timestamping improvements and IPv6 RA revamp

31 files changed, 2187 insertions, 666 deletions

diff --git a/src/basic/exit-status.c b/src/basic/exit-status.c
index 92fa5ace61..d488cfc59f 100644
--- a/src/basic/exit-status.c
+++ b/src/basic/exit-status.c
@@ -38,8 +38,7 @@ const char* exit_status_to_string(ExitStatus status, ExitStatusLevel level) {
                 return "FAILURE";
         }
 
-
-        if (level == EXIT_STATUS_SYSTEMD || level == EXIT_STATUS_LSB) {
+        if (IN_SET(level, EXIT_STATUS_SYSTEMD, EXIT_STATUS_LSB)) {
                 switch ((int) status) {
 
                 case EXIT_CHDIR:
@@ -189,13 +188,9 @@ bool is_clean_exit(int code, int status, ExitStatusSet *success_status) {
         /* If a daemon does not implement handlers for some of the
          * signals that's not considered an unclean shutdown */
         if (code == CLD_KILLED)
-                return
-                        status == SIGHUP ||
-                        status == SIGINT ||
-                        status == SIGTERM ||
-                        status == SIGPIPE ||
+                return IN_SET(status, SIGHUP, SIGINT, SIGTERM, SIGPIPE) ||
                         (success_status &&
-                        set_contains(success_status->signal, INT_TO_PTR(status)));
+                         set_contains(success_status->signal, INT_TO_PTR(status)));
 
         return false;
 }
@@ -207,15 +202,14 @@ bool is_clean_exit_lsb(int code, int status, ExitStatusSet *success_status) {
 
         return
                 code == CLD_EXITED &&
-                (status == EXIT_NOTINSTALLED || status == EXIT_NOTCONFIGURED);
+                IN_SET(status, EXIT_NOTINSTALLED, EXIT_NOTCONFIGURED);
 }
 
 void exit_status_set_free(ExitStatusSet *x) {
         assert(x);
 
-        set_free(x->status);
-        set_free(x->signal);
-        x->status = x->signal = NULL;
+        x->status = set_free(x->status);
+        x->signal = set_free(x->signal);
 }
 
 bool exit_status_set_is_empty(ExitStatusSet *x) {
diff --git a/src/basic/exit-status.h b/src/basic/exit-status.h
index 1208c8feed..2309f68815 100644
--- a/src/basic/exit-status.h
+++ b/src/basic/exit-status.h
@@ -25,6 +25,12 @@
 #include "macro.h"
 #include "set.h"
 
+/* This defines pretty names for the LSB 'start' verb exit codes. Note that they shouldn't be confused with the LSB
+ * 'status' verb exit codes which are defined very differently. For details see:
+ *
+ * https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
+ */
+
 typedef enum ExitStatus {
         /* EXIT_SUCCESS defined by libc */
         /* EXIT_FAILURE defined by libc */
@@ -37,9 +43,7 @@ typedef enum ExitStatus {
 
         /* The LSB suggests that error codes >= 200 are "reserved". We
          * use them here under the assumption that they hence are
-         * unused by init scripts.
-         *
-         * http://refspecs.linuxfoundation.org/LSB_3.2.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html */
+         * unused by init scripts. */
 
         EXIT_CHDIR = 200,
         EXIT_NICE,
@@ -81,9 +85,9 @@ typedef enum ExitStatus {
 } ExitStatus;
 
 typedef enum ExitStatusLevel {
-        EXIT_STATUS_MINIMAL,
-        EXIT_STATUS_SYSTEMD,
-        EXIT_STATUS_LSB,
+        EXIT_STATUS_MINIMAL,   /* only cover libc EXIT_STATUS/EXIT_FAILURE */
+        EXIT_STATUS_SYSTEMD,   /* cover libc and systemd's own exit codes */
+        EXIT_STATUS_LSB,       /* cover libc, systemd's own and LSB exit codes */
         EXIT_STATUS_FULL = EXIT_STATUS_LSB
 } ExitStatusLevel;
 
diff --git a/src/basic/in-addr-util.c b/src/basic/in-addr-util.c
index 245107ebb8..1447fa84aa 100644
--- a/src/basic/in-addr-util.c
+++ b/src/basic/in-addr-util.c
@@ -28,18 +28,26 @@
 #include "macro.h"
 #include "util.h"
 
+bool in4_addr_is_null(const struct in_addr *a) {
+        return a->s_addr == 0;
+}
+
+bool in6_addr_is_null(const struct in6_addr *a) {
+        return
+                a->s6_addr32[0] == 0 &&
+                a->s6_addr32[1] == 0 &&
+                a->s6_addr32[2] == 0 &&
+                a->s6_addr32[3] == 0;
+}
+
 int in_addr_is_null(int family, const union in_addr_union *u) {
         assert(u);
 
         if (family == AF_INET)
-                return u->in.s_addr == 0;
+                return in4_addr_is_null(&u->in);
 
         if (family == AF_INET6)
-                return
-                        u->in6.s6_addr32[0] == 0 &&
-                        u->in6.s6_addr32[1] == 0 &&
-                        u->in6.s6_addr32[2] == 0 &&
-                        u->in6.s6_addr32[3] == 0;
+                return in6_addr_is_null(&u->in6);
 
         return -EAFNOSUPPORT;
 }
diff --git a/src/basic/in-addr-util.h b/src/basic/in-addr-util.h
index 17798ce816..62cc1e1aa4 100644
--- a/src/basic/in-addr-util.h
+++ b/src/basic/in-addr-util.h
@@ -36,6 +36,9 @@ struct in_addr_data {
         union in_addr_union address;
 };
 
+bool in4_addr_is_null(const struct in_addr *a);
+bool in6_addr_is_null(const struct in6_addr *a);
+
 int in_addr_is_null(int family, const union in_addr_union *u);
 int in_addr_is_link_local(int family, const union in_addr_union *u);
 int in_addr_is_localhost(int family, const union in_addr_union *u);
diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index edd9179cb8..24e681bf85 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -87,6 +87,16 @@ dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
         return ts;
 }
 
+triple_timestamp* triple_timestamp_get(triple_timestamp *ts) {
+        assert(ts);
+
+        ts->realtime = now(CLOCK_REALTIME);
+        ts->monotonic = now(CLOCK_MONOTONIC);
+        ts->boottime = clock_boottime_supported() ? now(CLOCK_BOOTTIME) : USEC_INFINITY;
+
+        return ts;
+}
+
 dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
         int64_t delta;
         assert(ts);
@@ -104,6 +114,24 @@ dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
         return ts;
 }
 
+triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u) {
+        int64_t delta;
+
+        assert(ts);
+
+        if (u == USEC_INFINITY || u <= 0) {
+                ts->realtime = ts->monotonic = ts->boottime = u;
+                return ts;
+        }
+
+        ts->realtime = u;
+        delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
+        ts->monotonic = usec_sub(now(CLOCK_MONOTONIC), delta);
+        ts->boottime = clock_boottime_supported() ? usec_sub(now(CLOCK_BOOTTIME), delta) : USEC_INFINITY;
+
+        return ts;
+}
+
 dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
         int64_t delta;
         assert(ts);
@@ -136,6 +164,26 @@ dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, us
         return ts;
 }
 
+usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock) {
+
+        switch (clock) {
+
+        case CLOCK_REALTIME:
+        case CLOCK_REALTIME_ALARM:
+                return ts->realtime;
+
+        case CLOCK_MONOTONIC:
+                return ts->monotonic;
+
+        case CLOCK_BOOTTIME:
+        case CLOCK_BOOTTIME_ALARM:
+                return ts->boottime;
+
+        default:
+                return USEC_INFINITY;
+        }
+}
+
 usec_t timespec_load(const struct timespec *ts) {
         assert(ts);
 
@@ -1107,6 +1155,30 @@ clockid_t clock_boottime_or_monotonic(void) {
                 return CLOCK_MONOTONIC;
 }
 
+bool clock_supported(clockid_t clock) {
+        struct timespec ts;
+
+        switch (clock) {
+
+        case CLOCK_MONOTONIC:
+        case CLOCK_REALTIME:
+                return true;
+
+        case CLOCK_BOOTTIME:
+                return clock_boottime_supported();
+
+        case CLOCK_BOOTTIME_ALARM:
+                if (!clock_boottime_supported())
+                        return false;
+
+                /* fall through, after checking the cached value for CLOCK_BOOTTIME. */
+
+        default:
+                /* For everything else, check properly */
+                return clock_gettime(clock, &ts) >= 0;
+        }
+}
+
 int get_timezone(char **tz) {
         _cleanup_free_ char *t = NULL;
         const char *e;
diff --git a/src/basic/time-util.h b/src/basic/time-util.h
index a5e3f567ec..1b058f0e49 100644
--- a/src/basic/time-util.h
+++ b/src/basic/time-util.h
@@ -39,6 +39,12 @@ typedef struct dual_timestamp {
         usec_t monotonic;
 } dual_timestamp;
 
+typedef struct triple_timestamp {
+        usec_t realtime;
+        usec_t monotonic;
+        usec_t boottime;
+} triple_timestamp;
+
 #define USEC_INFINITY ((usec_t) -1)
 #define NSEC_INFINITY ((nsec_t) -1)
 
@@ -69,7 +75,8 @@ typedef struct dual_timestamp {
 
 #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1)
 
-#define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) { 0ULL, 0ULL })
+#define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) {})
+#define TRIPLE_TIMESTAMP_NULL ((struct triple_timestamp) {})
 
 usec_t now(clockid_t clock);
 nsec_t now_nsec(clockid_t clock);
@@ -79,11 +86,28 @@ dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
 dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u);
 dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u);
 
+triple_timestamp* triple_timestamp_get(triple_timestamp *ts);
+triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u);
+
+#define DUAL_TIMESTAMP_HAS_CLOCK(clock)                               \
+        IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC)
+
+#define TRIPLE_TIMESTAMP_HAS_CLOCK(clock)                               \
+        IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM)
+
 static inline bool dual_timestamp_is_set(dual_timestamp *ts) {
         return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) ||
                 (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY));
 }
 
+static inline bool triple_timestamp_is_set(triple_timestamp *ts) {
+        return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) ||
+                (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY) ||
+                (ts->boottime > 0 && ts->boottime != USEC_INFINITY));
+}
+
+usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock);
+
 usec_t timespec_load(const struct timespec *ts) _pure_;
 struct timespec *timespec_store(struct timespec *ts, usec_t u);
 
@@ -113,6 +137,7 @@ int get_timezones(char ***l);
 bool timezone_is_valid(const char *name);
 
 bool clock_boottime_supported(void);
+bool clock_supported(clockid_t clock);
 clockid_t clock_boottime_or_monotonic(void);
 
 #define xstrftime(buf, fmt, tm) \
diff --git a/src/basic/unaligned.h b/src/basic/unaligned.h
index 79be645bed..7c847a3ccb 100644
--- a/src/basic/unaligned.h
+++ b/src/basic/unaligned.h
@@ -109,3 +109,21 @@ static inline void unaligned_write_le64(void *_u, uint64_t a) {
         unaligned_write_le32(u, (uint32_t) a);
         unaligned_write_le32(u + 4, (uint32_t) (a >> 32));
 }
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define unaligned_read_ne16 unaligned_read_be16
+#define unaligned_read_ne32 unaligned_read_be32
+#define unaligned_read_ne64 unaligned_read_be64
+
+#define unaligned_write_ne16 unaligned_write_be16
+#define unaligned_write_ne32 unaligned_write_be32
+#define unaligned_write_ne64 unaligned_write_be64
+#else
+#define unaligned_read_ne16 unaligned_read_le16
+#define unaligned_read_ne32 unaligned_read_le32
+#define unaligned_read_ne64 unaligned_read_le64
+
+#define unaligned_write_ne16 unaligned_write_le16
+#define unaligned_write_ne32 unaligned_write_le32
+#define unaligned_write_ne64 unaligned_write_le64
+#endif
diff --git a/src/libsystemd-network/icmp6-util.c b/src/libsystemd-network/icmp6-util.c
index d81e9ebd88..c2e4b0e9e3 100644
--- a/src/libsystemd-network/icmp6-util.c
+++ b/src/libsystemd-network/icmp6-util.c
@@ -49,7 +49,8 @@ int icmp6_bind_router_solicitation(int index) {
         };
         _cleanup_close_ int s = -1;
         char ifname[IF_NAMESIZE] = "";
-        int r, zero = 0, one = 1, hops = 255;
+        static const int zero = 0, one = 1, hops = 255;
+        int r;
 
         s = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_ICMPV6);
         if (s < 0)
@@ -85,6 +86,10 @@ int icmp6_bind_router_solicitation(int index) {
         if (r < 0)
                 return -errno;
 
+        r = setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
+        if (r < 0)
+                return -errno;
+
         if (if_indextoname(index, ifname) == 0)
                 return -errno;
 
diff --git a/src/libsystemd-network/lldp-internal.h b/src/libsystemd-network/lldp-internal.h
index 7592bc4305..becc162fab 100644
--- a/src/libsystemd-network/lldp-internal.h
+++ b/src/libsystemd-network/lldp-internal.h
@@ -28,6 +28,8 @@
 #include "prioq.h"
 
 struct sd_lldp {
+        unsigned n_ref;
+
         int ifindex;
         int fd;
 
diff --git a/src/libsystemd-network/lldp-neighbor.c b/src/libsystemd-network/lldp-neighbor.c
index 6a716430e3..88f7e329b0 100644
--- a/src/libsystemd-network/lldp-neighbor.c
+++ b/src/libsystemd-network/lldp-neighbor.c
@@ -360,9 +360,16 @@ end_marker:
 void lldp_neighbor_start_ttl(sd_lldp_neighbor *n) {
         assert(n);
 
-        if (n->ttl > 0)
-                n->until = usec_add(now(clock_boottime_or_monotonic()), n->ttl * USEC_PER_SEC);
-        else
+        if (n->ttl > 0) {
+                usec_t base;
+
+                /* Use the packet's timestamp if there is one known */
+                base = triple_timestamp_by_clock(&n->timestamp, clock_boottime_or_monotonic());
+                if (base <= 0 || base == USEC_INFINITY)
+                        base = now(clock_boottime_or_monotonic()); /* Otherwise, take the current time */
+
+                n->until = usec_add(base, n->ttl * USEC_PER_SEC);
+        } else
                 n->until = 0;
 
         if (n->lldp)
@@ -588,11 +595,11 @@ done:
         return 0;
 }
 
-_public_ int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret) {
+_public_ int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret_sec) {
         assert_return(n, -EINVAL);
-        assert_return(ret, -EINVAL);
+        assert_return(ret_sec, -EINVAL);
 
-        *ret = n->ttl;
+        *ret_sec = n->ttl;
         return 0;
 }
 
@@ -651,7 +658,7 @@ _public_ int sd_lldp_neighbor_get_enabled_capabilities(sd_lldp_neighbor *n, uint
         return 0;
 }
 
-int sd_lldp_neighbor_from_raw(sd_lldp_neighbor **ret, const void *raw, size_t raw_size) {
+_public_ int sd_lldp_neighbor_from_raw(sd_lldp_neighbor **ret, const void *raw, size_t raw_size) {
         _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
         int r;
 
@@ -668,7 +675,7 @@ int sd_lldp_neighbor_from_raw(sd_lldp_neighbor **ret, const void *raw, size_t ra
                 return r;
 
         *ret = n;
-        n = 0;
+        n = NULL;
 
         return r;
 }
@@ -679,7 +686,7 @@ _public_ int sd_lldp_neighbor_tlv_rewind(sd_lldp_neighbor *n) {
         assert(n->raw_size >= sizeof(struct ether_header));
         n->rindex = sizeof(struct ether_header);
 
-        return 0;
+        return n->rindex < n->raw_size;
 }
 
 _public_ int sd_lldp_neighbor_tlv_next(sd_lldp_neighbor *n) {
@@ -693,7 +700,7 @@ _public_ int sd_lldp_neighbor_tlv_next(sd_lldp_neighbor *n) {
         if (n->rindex + 2 > n->raw_size) /* Truncated message */
                 return -EBADMSG;
 
-        length = LLDP_NEIGHBOR_LENGTH(n);
+        length = LLDP_NEIGHBOR_TLV_LENGTH(n);
         if (n->rindex + 2 + length > n->raw_size)
                 return -EBADMSG;
 
@@ -711,7 +718,7 @@ _public_ int sd_lldp_neighbor_tlv_get_type(sd_lldp_neighbor *n, uint8_t *type) {
         if (n->rindex + 2 > n->raw_size)
                 return -EBADMSG;
 
-        *type = LLDP_NEIGHBOR_TYPE(n);
+        *type = LLDP_NEIGHBOR_TLV_TYPE(n);
         return 0;
 }
 
@@ -743,14 +750,14 @@ _public_ int sd_lldp_neighbor_tlv_get_oui(sd_lldp_neighbor *n, uint8_t oui[3], u
         if (r == 0)
                 return -ENXIO;
 
-        length = LLDP_NEIGHBOR_LENGTH(n);
+        length = LLDP_NEIGHBOR_TLV_LENGTH(n);
         if (length < 4)
                 return -EBADMSG;
 
         if (n->rindex + 2 + length > n->raw_size)
                 return -EBADMSG;
 
-        d = LLDP_NEIGHBOR_DATA(n);
+        d = LLDP_NEIGHBOR_TLV_DATA(n);
         memcpy(oui, d, 3);
         *subtype = d[3];
 
@@ -782,8 +789,7 @@ _public_ int sd_lldp_neighbor_tlv_get_raw(sd_lldp_neighbor *n, const void **ret,
         if (n->rindex + 2 > n->raw_size)
                 return -EBADMSG;
 
-        length = LLDP_NEIGHBOR_LENGTH(n);
-
+        length = LLDP_NEIGHBOR_TLV_LENGTH(n);
         if (n->rindex + 2 + length > n->raw_size)
                 return -EBADMSG;
 
@@ -792,3 +798,16 @@ _public_ int sd_lldp_neighbor_tlv_get_raw(sd_lldp_neighbor *n, const void **ret,
 
         return 0;
 }
+
+_public_ int sd_lldp_neighbor_get_timestamp(sd_lldp_neighbor *n, clockid_t clock, uint64_t *ret) {
+        assert_return(n, -EINVAL);
+        assert_return(TRIPLE_TIMESTAMP_HAS_CLOCK(clock), -EOPNOTSUPP);
+        assert_return(clock_supported(clock), -EOPNOTSUPP);
+        assert_return(ret, -EINVAL);
+
+        if (!triple_timestamp_is_set(&n->timestamp))
+                return -ENODATA;
+
+        *ret = triple_timestamp_by_clock(&n->timestamp, clock);
+        return 0;
+}
diff --git a/src/libsystemd-network/lldp-neighbor.h b/src/libsystemd-network/lldp-neighbor.h
index f203bfa604..c1a7606d06 100644
--- a/src/libsystemd-network/lldp-neighbor.h
+++ b/src/libsystemd-network/lldp-neighbor.h
@@ -43,6 +43,8 @@ struct sd_lldp_neighbor {
         sd_lldp *lldp;
         unsigned n_ref;
 
+        triple_timestamp timestamp;
+
         usec_t until;
         unsigned prioq_idx;
 
@@ -81,18 +83,18 @@ static inline void *LLDP_NEIGHBOR_RAW(const sd_lldp_neighbor *n) {
         return (uint8_t*) n + ALIGN(sizeof(sd_lldp_neighbor));
 }
 
-static inline uint8_t LLDP_NEIGHBOR_TYPE(const sd_lldp_neighbor *n) {
+static inline uint8_t LLDP_NEIGHBOR_TLV_TYPE(const sd_lldp_neighbor *n) {
         return ((uint8_t*) LLDP_NEIGHBOR_RAW(n))[n->rindex] >> 1;
 }
 
-static inline size_t LLDP_NEIGHBOR_LENGTH(const sd_lldp_neighbor *n) {
+static inline size_t LLDP_NEIGHBOR_TLV_LENGTH(const sd_lldp_neighbor *n) {
         uint8_t *p;
 
         p = (uint8_t*) LLDP_NEIGHBOR_RAW(n) + n->rindex;
         return p[1] + (((size_t) (p[0] & 1)) << 8);
 }
 
-static inline void* LLDP_NEIGHBOR_DATA(const sd_lldp_neighbor *n) {
+static inline void* LLDP_NEIGHBOR_TLV_DATA(const sd_lldp_neighbor *n) {
         return ((uint8_t*) LLDP_NEIGHBOR_RAW(n)) + n->rindex + 2;
 }
 
diff --git a/src/libsystemd-network/ndisc-internal.h b/src/libsystemd-network/ndisc-internal.h
new file mode 100644
index 0000000000..60e183ff8c
--- /dev/null
+++ b/src/libsystemd-network/ndisc-internal.h
@@ -0,0 +1,49 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 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 "log.h"
+
+#include "sd-ndisc.h"
+
+struct sd_ndisc {
+        unsigned n_ref;
+
+        int ifindex;
+        int fd;
+
+        sd_event *event;
+        int event_priority;
+
+        struct ether_addr mac_addr;
+        uint8_t hop_limit;
+        uint32_t mtu;
+
+        sd_event_source *recv_event_source;
+        sd_event_source *timeout_event_source;
+
+        unsigned nd_sent;
+
+        sd_ndisc_callback_t callback;
+        void *userdata;
+};
+
+#define log_ndisc_errno(error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "NDISC: " fmt, ##__VA_ARGS__)
+#define log_ndisc(fmt, ...) log_ndisc_errno(0, fmt, ##__VA_ARGS__)
diff --git a/src/libsystemd-network/ndisc-router.c b/src/libsystemd-network/ndisc-router.c
new file mode 100644
index 0000000000..d9950b638c
--- /dev/null
+++ b/src/libsystemd-network/ndisc-router.c
@@ -0,0 +1,779 @@
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 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 "sd-ndisc.h"
+
+#include "alloc-util.h"
+#include "dns-domain.h"
+#include "hostname-util.h"
+#include "missing.h"
+#include "ndisc-internal.h"
+#include "ndisc-router.h"
+#include "strv.h"
+
+_public_ sd_ndisc_router* sd_ndisc_router_ref(sd_ndisc_router *rt) {
+        if (!rt)
+                return NULL;
+
+        assert(rt->n_ref > 0);
+        rt->n_ref++;
+
+        return rt;
+}
+
+_public_ sd_ndisc_router* sd_ndisc_router_unref(sd_ndisc_router *rt) {
+        if (!rt)
+                return NULL;
+
+        assert(rt->n_ref > 0);
+        rt->n_ref--;
+
+        if (rt->n_ref > 0)
+                return NULL;
+
+        free(rt);
+        return NULL;
+}
+
+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(rt);
+        if (r < 0)
+                return r;
+
+        *ret = rt;
+        rt = NULL;
+
+        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_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)) {
+                log_ndisc("Too small to be a router advertisement, ignoring.");
+                return -EBADMSG;
+        }
+
+        /* 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) {
+                log_ndisc("Received ND packet that is not a router advertisement, ignoring.");
+                return -EBADMSG;
+        }
+
+        if (a->nd_ra_code != 0) {
+                log_ndisc("Received ND packet with wrong RA code, ignoring.");
+                return -EBADMSG;
+        }
+
+        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) {
+                        log_ndisc("Option lacks header, ignoring datagram.");
+                        return -EBADMSG;
+                }
+
+                type = p[0];
+                length = p[1] * 8;
+
+                if (length == 0) {
+                        log_ndisc("Zero-length option, ignoring datagram.");
+                        return -EBADMSG;
+                }
+                if (left < length) {
+                        log_ndisc("Option truncated, ignoring datagram.");
+                        return -EBADMSG;
+                }
+
+                switch (type) {
+
+                case SD_NDISC_OPTION_PREFIX_INFORMATION:
+
+                        if (length != 4*8) {
+                                log_ndisc("Prefix option of invalid size, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        if (p[2] > 128) {
+                                log_ndisc("Bad prefix length, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        break;
+
+                case SD_NDISC_OPTION_MTU: {
+                        uint32_t m;
+
+                        if (has_mtu) {
+                                log_ndisc("MTU option specified twice, ignoring.");
+                                continue;
+                        }
+
+                        if (length != 8) {
+                                log_ndisc("MTU option of invalid size, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        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) {
+                                log_ndisc("Route information option of invalid size, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        if (p[2] > 128) {
+                                log_ndisc("Bad route prefix length, ignoring datagram.");
+                                return -EBADMSG;
+                        }
+
+                        break;
+
+                case SD_NDISC_OPTION_RDNSS:
+                        if (length < 3*8 || (length % (2*8)) != 1*8) {
+                                log_ndisc("RDNSS option has invalid size.");
+                                return -EBADMSG;
+                        }
+
+                        break;
+
+                case SD_NDISC_OPTION_FLAGS_EXTENSION:
+
+                        if (has_flag_extension) {
+                                log_ndisc("Flags extension option specified twice, ignoring.");
+                                continue;
+                        }
+
+                        if (length < 1*8) {
+                                log_ndisc("Flags extension option has invalid size.");
+                                return -EBADMSG;
+                        }
+
+                        /* 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) {
+                                log_ndisc("DNSSL option has invalid size.");
+                                return -EBADMSG;
+                        }
+
+                        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;
+        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_flags_reserved;
+        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 allocated = 0, 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, &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, allocated, 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 = l;
+        l = NULL;
+
+        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;
+}
diff --git a/src/libsystemd-network/ndisc-router.h b/src/libsystemd-network/ndisc-router.h
new file mode 100644
index 0000000000..1fe703da63
--- /dev/null
+++ b/src/libsystemd-network/ndisc-router.h
@@ -0,0 +1,62 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 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 "sd-ndisc.h"
+
+#include "time-util.h"
+
+struct sd_ndisc_router {
+        unsigned n_ref;
+
+        triple_timestamp timestamp;
+        struct in6_addr address;
+
+        /* The raw packet size. The data is appended to the object, accessible via NDIS_ROUTER_RAW() */
+        size_t raw_size;
+
+        /* The current read index for the iterative option interface */
+        size_t rindex;
+
+        uint64_t flags;
+        unsigned preference;
+        uint16_t lifetime;
+
+        uint8_t hop_limit;
+        uint32_t mtu;
+};
+
+static inline void* NDISC_ROUTER_RAW(const sd_ndisc_router *rt) {
+        return (uint8_t*) rt + ALIGN(sizeof(sd_ndisc_router));
+}
+
+static inline void *NDISC_ROUTER_OPTION_DATA(const sd_ndisc_router *rt) {
+        return ((uint8_t*) NDISC_ROUTER_RAW(rt)) + rt->rindex;
+}
+
+static inline uint8_t NDISC_ROUTER_OPTION_TYPE(const sd_ndisc_router *rt) {
+        return ((uint8_t*) NDISC_ROUTER_OPTION_DATA(rt))[0];
+}
+static inline size_t NDISC_ROUTER_OPTION_LENGTH(const sd_ndisc_router *rt) {
+        return ((uint8_t*) NDISC_ROUTER_OPTION_DATA(rt))[1] * 8;
+}
+
+sd_ndisc_router *ndisc_router_new(size_t raw_size);
+int ndisc_router_parse(sd_ndisc_router *rt);
diff --git a/src/libsystemd-network/network-internal.c b/src/libsystemd-network/network-internal.c
index bfaa75880b..ce30b7fc25 100644
--- a/src/libsystemd-network/network-internal.c
+++ b/src/libsystemd-network/network-internal.c
@@ -380,18 +380,21 @@ int deserialize_in_addrs(struct in_addr **ret, const char *string) {
         return size;
 }
 
-void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses,
-                         size_t size) {
+void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses, size_t size) {
         unsigned i;
 
         assert(f);
         assert(addresses);
         assert(size);
 
-        for (i = 0; i < size; i++)
-                fprintf(f, SD_NDISC_ADDRESS_FORMAT_STR"%s",
-                        SD_NDISC_ADDRESS_FORMAT_VAL(addresses[i]),
-                        (i < (size - 1)) ? " ": "");
+        for (i = 0; i < size; i++) {
+                char buffer[INET6_ADDRSTRLEN];
+
+                fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);
+
+                if (i < size - 1)
+                        fputc(' ', f);
+        }
 }
 
 int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
diff --git a/src/libsystemd-network/sd-lldp.c b/src/libsystemd-network/sd-lldp.c
index 9d4587c80e..0bd1e66aa0 100644
--- a/src/libsystemd-network/sd-lldp.c
+++ b/src/libsystemd-network/sd-lldp.c
@@ -43,7 +43,6 @@ static void lldp_flush_neighbors(sd_lldp *lldp) {
 
 static void lldp_callback(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n) {
         assert(lldp);
-        assert(n);
 
         log_lldp("Invoking callback for '%c'.", event);
 
@@ -138,6 +137,7 @@ static int lldp_add_neighbor(sd_lldp *lldp, sd_lldp_neighbor *n) {
 
                 if (lldp_neighbor_equal(n, old)) {
                         /* Is this equal, then restart the TTL counter, but don't do anyting else. */
+                        old->timestamp = n->timestamp;
                         lldp_start_timer(lldp, old);
                         lldp_callback(lldp, SD_LLDP_EVENT_REFRESHED, old);
                         return 0;
@@ -171,7 +171,7 @@ static int lldp_add_neighbor(sd_lldp *lldp, sd_lldp_neighbor *n) {
 
 finish:
         if (old)
-                lldp_callback(lldp, SD_LLDP_EVENT_REMOVED, n);
+                lldp_callback(lldp, SD_LLDP_EVENT_REMOVED, old);
 
         return r;
 }
@@ -202,6 +202,7 @@ static int lldp_receive_datagram(sd_event_source *s, int fd, uint32_t revents, v
         _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
         ssize_t space, length;
         sd_lldp *lldp = userdata;
+        struct timespec ts;
 
         assert(fd >= 0);
         assert(lldp);
@@ -215,21 +216,41 @@ static int lldp_receive_datagram(sd_event_source *s, int fd, uint32_t revents, v
                 return -ENOMEM;
 
         length = recv(fd, LLDP_NEIGHBOR_RAW(n), n->raw_size, MSG_DONTWAIT);
-        if (length < 0)
+        if (length < 0) {
+                if (errno == EAGAIN || errno == EINTR)
+                        return 0;
+
                 return log_lldp_errno(errno, "Failed to read LLDP datagram: %m");
+        }
 
         if ((size_t) length != n->raw_size) {
                 log_lldp("Packet size mismatch.");
                 return -EINVAL;
         }
 
+        /* Try to get the timestamp of this packet if it is known */
+        if (ioctl(fd, SIOCGSTAMPNS, &ts) >= 0)
+                triple_timestamp_from_realtime(&n->timestamp, timespec_load(&ts));
+        else
+                triple_timestamp_get(&n->timestamp);
+
         return lldp_handle_datagram(lldp, n);
 }
 
+static void lldp_reset(sd_lldp *lldp) {
+        assert(lldp);
+
+        lldp->timer_event_source = sd_event_source_unref(lldp->timer_event_source);
+        lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
+        lldp->fd = safe_close(lldp->fd);
+}
+
 _public_ int sd_lldp_start(sd_lldp *lldp) {
         int r;
 
         assert_return(lldp, -EINVAL);
+        assert_return(lldp->event, -EINVAL);
+        assert_return(lldp->ifindex > 0, -EINVAL);
 
         if (lldp->fd >= 0)
                 return 0;
@@ -240,24 +261,21 @@ _public_ int sd_lldp_start(sd_lldp *lldp) {
         if (lldp->fd < 0)
                 return lldp->fd;
 
-        if (lldp->event) {
-                r = sd_event_add_io(lldp->event, &lldp->io_event_source, lldp->fd, EPOLLIN, lldp_receive_datagram, lldp);
-                if (r < 0)
-                        goto fail;
+        r = sd_event_add_io(lldp->event, &lldp->io_event_source, lldp->fd, EPOLLIN, lldp_receive_datagram, lldp);
+        if (r < 0)
+                goto fail;
 
-                r = sd_event_source_set_priority(lldp->io_event_source, lldp->event_priority);
-                if (r < 0)
-                        goto fail;
+        r = sd_event_source_set_priority(lldp->io_event_source, lldp->event_priority);
+        if (r < 0)
+                goto fail;
 
-                (void) sd_event_source_set_description(lldp->io_event_source, "lldp-io");
-        }
+        (void) sd_event_source_set_description(lldp->io_event_source, "lldp-io");
 
+        log_lldp("Started LLDP client");
         return 1;
 
 fail:
-        lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
-        lldp->fd = safe_close(lldp->fd);
-
+        lldp_reset(lldp);
         return r;
 }
 
@@ -267,10 +285,9 @@ _public_ int sd_lldp_stop(sd_lldp *lldp) {
         if (lldp->fd < 0)
                 return 0;
 
-        lldp->timer_event_source = sd_event_source_unref(lldp->timer_event_source);
-        lldp->io_event_source = sd_event_source_unref(lldp->io_event_source);
-        lldp->fd = safe_close(lldp->fd);
+        log_lldp("Stopping LLDP client");
 
+        lldp_reset(lldp);
         lldp_flush_neighbors(lldp);
 
         return 1;
@@ -305,6 +322,12 @@ _public_ int sd_lldp_detach_event(sd_lldp *lldp) {
         return 0;
 }
 
+_public_ sd_event* sd_lldp_get_event(sd_lldp *lldp) {
+        assert_return(lldp, NULL);
+
+        return lldp->event;
+}
+
 _public_ int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_callback_t cb, void *userdata) {
         assert_return(lldp, -EINVAL);
 
@@ -314,39 +337,60 @@ _public_ int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_callback_t cb, void *us
         return 0;
 }
 
+_public_ int sd_lldp_set_ifindex(sd_lldp *lldp, int ifindex) {
+        assert_return(lldp, -EINVAL);
+        assert_return(ifindex > 0, -EINVAL);
+        assert_return(lldp->fd < 0, -EBUSY);
+
+        lldp->ifindex = ifindex;
+        return 0;
+}
+
+_public_ sd_lldp* sd_lldp_ref(sd_lldp *lldp) {
+
+        if (!lldp)
+                return NULL;
+
+        assert(lldp->n_ref > 0);
+        lldp->n_ref++;
+
+        return lldp;
+}
+
 _public_ sd_lldp* sd_lldp_unref(sd_lldp *lldp) {
 
         if (!lldp)
                 return NULL;
 
+        assert(lldp->n_ref > 0);
+        lldp->n_ref --;
+
+        if (lldp->n_ref > 0)
+                return NULL;
+
+        lldp_reset(lldp);
+        sd_lldp_detach_event(lldp);
         lldp_flush_neighbors(lldp);
 
         hashmap_free(lldp->neighbor_by_id);
         prioq_free(lldp->neighbor_by_expiry);
-
-        sd_event_source_unref(lldp->io_event_source);
-        sd_event_source_unref(lldp->timer_event_source);
-        sd_event_unref(lldp->event);
-        safe_close(lldp->fd);
-
         free(lldp);
 
         return NULL;
 }
 
-_public_ int sd_lldp_new(sd_lldp **ret, int ifindex) {
+_public_ int sd_lldp_new(sd_lldp **ret) {
         _cleanup_(sd_lldp_unrefp) sd_lldp *lldp = NULL;
         int r;
 
         assert_return(ret, -EINVAL);
-        assert_return(ifindex > 0, -EINVAL);
 
         lldp = new0(sd_lldp, 1);
         if (!lldp)
                 return -ENOMEM;
 
+        lldp->n_ref = 1;
         lldp->fd = -1;
-        lldp->ifindex = ifindex;
         lldp->neighbors_max = LLDP_DEFAULT_NEIGHBORS_MAX;
         lldp->capability_mask = (uint16_t) -1;
 
@@ -486,11 +530,10 @@ _public_ int sd_lldp_set_filter_address(sd_lldp *lldp, const struct ether_addr *
         /* In order to deal nicely with bridges that send back our own packets, allow one address to be filtered, so
          * that our own can be filtered out here. */
 
-        if (!addr) {
+        if (addr)
+                lldp->filter_address = *addr;
+        else
                 zero(lldp->filter_address);
-                return 0;
-        }
 
-        lldp->filter_address = *addr;
         return 0;
 }
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c
index ccb8002173..ea3fe369ce 100644
--- a/src/libsystemd-network/sd-ndisc.c
+++ b/src/libsystemd-network/sd-ndisc.c
@@ -19,165 +19,71 @@
 
 #include <netinet/icmp6.h>
 #include <netinet/in.h>
-#include <netinet/ip6.h>
-#include <stdbool.h>
-#include <string.h>
-#include <sys/ioctl.h>
 
 #include "sd-ndisc.h"
 
 #include "alloc-util.h"
-#include "async.h"
+#include "fd-util.h"
 #include "icmp6-util.h"
 #include "in-addr-util.h"
-#include "list.h"
+#include "ndisc-internal.h"
+#include "ndisc-router.h"
 #include "socket-util.h"
 #include "string-util.h"
+#include "util.h"
 
 #define NDISC_ROUTER_SOLICITATION_INTERVAL (4U * USEC_PER_SEC)
-#define NDISC_MAX_ROUTER_SOLICITATIONS     3U
+#define NDISC_MAX_ROUTER_SOLICITATIONS 3U
 
-enum NDiscState {
-        NDISC_STATE_IDLE,
-        NDISC_STATE_SOLICITATION_SENT,
-        NDISC_STATE_ADVERTISEMENT_LISTEN,
-        _NDISC_STATE_MAX,
-        _NDISC_STATE_INVALID = -1,
-};
+static void ndisc_callback(sd_ndisc *ndisc, sd_ndisc_event event, sd_ndisc_router *rt) {
+        assert(ndisc);
 
-#define IP6_MIN_MTU 1280U
-#define ICMP6_RECV_SIZE (IP6_MIN_MTU - sizeof(struct ip6_hdr))
-#define NDISC_OPT_LEN_UNITS 8U
+        log_ndisc("Invoking callback for '%c'.", event);
 
-#define ND_RA_FLAG_PREF                0x18
-#define ND_RA_FLAG_PREF_LOW            0x03
-#define ND_RA_FLAG_PREF_MEDIUM         0x0
-#define ND_RA_FLAG_PREF_HIGH           0x1
-#define ND_RA_FLAG_PREF_INVALID        0x2
+        if (!ndisc->callback)
+                return;
 
-typedef struct NDiscPrefix NDiscPrefix;
-
-struct NDiscPrefix {
-        unsigned n_ref;
-
-        sd_ndisc *nd;
-
-        LIST_FIELDS(NDiscPrefix, prefixes);
-
-        uint8_t len;
-        usec_t valid_until;
-        struct in6_addr addr;
-};
-
-struct sd_ndisc {
-        unsigned n_ref;
-
-        enum NDiscState state;
-        int ifindex;
-        int fd;
-
-        sd_event *event;
-        int event_priority;
-
-        struct ether_addr mac_addr;
-        uint32_t mtu;
-
-        LIST_HEAD(NDiscPrefix, prefixes);
-
-        sd_event_source *recv_event_source;
-        sd_event_source *timeout_event_source;
-
-        unsigned nd_sent;
-
-        sd_ndisc_router_callback_t router_callback;
-        sd_ndisc_prefix_autonomous_callback_t prefix_autonomous_callback;
-        sd_ndisc_prefix_onlink_callback_t prefix_onlink_callback;
-        sd_ndisc_callback_t callback;
-        void *userdata;
-};
-
-#define log_ndisc_errno(p, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "NDisc CLIENT: " fmt, ##__VA_ARGS__)
-#define log_ndisc(p, fmt, ...) log_ndisc_errno(p, 0, fmt, ##__VA_ARGS__)
-
-static NDiscPrefix *ndisc_prefix_unref(NDiscPrefix *prefix) {
-
-        if (!prefix)
-                return NULL;
-
-        assert(prefix->n_ref > 0);
-        prefix->n_ref--;
-
-        if (prefix->n_ref > 0)
-                return NULL;
-
-        if (prefix->nd)
-                LIST_REMOVE(prefixes, prefix->nd->prefixes, prefix);
-
-        free(prefix);
-
-        return NULL;
-}
-
-static int ndisc_prefix_new(sd_ndisc *nd, NDiscPrefix **ret) {
-        NDiscPrefix *prefix;
-
-        assert(ret);
-
-        prefix = new0(NDiscPrefix, 1);
-        if (!prefix)
-                return -ENOMEM;
-
-        prefix->n_ref = 1;
-        LIST_INIT(prefixes, prefix);
-        prefix->nd = nd;
-
-        *ret = prefix;
-        return 0;
+        ndisc->callback(ndisc, event, rt, ndisc->userdata);
 }
 
-int sd_ndisc_set_callback(
+_public_ int sd_ndisc_set_callback(
                 sd_ndisc *nd,
-                sd_ndisc_router_callback_t router_callback,
-                sd_ndisc_prefix_onlink_callback_t prefix_onlink_callback,
-                sd_ndisc_prefix_autonomous_callback_t prefix_autonomous_callback,
                 sd_ndisc_callback_t callback,
                 void *userdata) {
 
         assert_return(nd, -EINVAL);
 
-        nd->router_callback = router_callback;
-        nd->prefix_onlink_callback = prefix_onlink_callback;
-        nd->prefix_autonomous_callback = prefix_autonomous_callback;
         nd->callback = callback;
         nd->userdata = userdata;
 
         return 0;
 }
 
-int sd_ndisc_set_ifindex(sd_ndisc *nd, int ifindex) {
+_public_ int sd_ndisc_set_ifindex(sd_ndisc *nd, int ifindex) {
         assert_return(nd, -EINVAL);
         assert_return(ifindex > 0, -EINVAL);
+        assert_return(nd->fd < 0, -EBUSY);
 
         nd->ifindex = ifindex;
         return 0;
 }
 
-int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr) {
+_public_ int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr) {
         assert_return(nd, -EINVAL);
 
         if (mac_addr)
-                memcpy(&nd->mac_addr, mac_addr, sizeof(nd->mac_addr));
+                nd->mac_addr = *mac_addr;
         else
                 zero(nd->mac_addr);
 
         return 0;
-
 }
 
-int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority) {
+_public_ int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority) {
         int r;
 
         assert_return(nd, -EINVAL);
+        assert_return(nd->fd < 0, -EBUSY);
         assert_return(!nd->event, -EBUSY);
 
         if (event)
@@ -193,21 +99,22 @@ int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority) {
         return 0;
 }
 
-int sd_ndisc_detach_event(sd_ndisc *nd) {
+_public_ int sd_ndisc_detach_event(sd_ndisc *nd) {
+
         assert_return(nd, -EINVAL);
+        assert_return(nd->fd < 0, -EBUSY);
 
         nd->event = sd_event_unref(nd->event);
-
         return 0;
 }
 
-sd_event *sd_ndisc_get_event(sd_ndisc *nd) {
+_public_ sd_event *sd_ndisc_get_event(sd_ndisc *nd) {
         assert_return(nd, NULL);
 
         return nd->event;
 }
 
-sd_ndisc *sd_ndisc_ref(sd_ndisc *nd) {
+_public_ sd_ndisc *sd_ndisc_ref(sd_ndisc *nd) {
 
         if (!nd)
                 return NULL;
@@ -221,15 +128,14 @@ sd_ndisc *sd_ndisc_ref(sd_ndisc *nd) {
 static int ndisc_reset(sd_ndisc *nd) {
         assert(nd);
 
-        nd->recv_event_source = sd_event_source_unref(nd->recv_event_source);
-        nd->fd = asynchronous_close(nd->fd);
         nd->timeout_event_source = sd_event_source_unref(nd->timeout_event_source);
+        nd->recv_event_source = sd_event_source_unref(nd->recv_event_source);
+        nd->fd = safe_close(nd->fd);
 
         return 0;
 }
 
-sd_ndisc *sd_ndisc_unref(sd_ndisc *nd) {
-        NDiscPrefix *prefix, *p;
+_public_ sd_ndisc *sd_ndisc_unref(sd_ndisc *nd) {
 
         if (!nd)
                 return NULL;
@@ -242,16 +148,12 @@ sd_ndisc *sd_ndisc_unref(sd_ndisc *nd) {
 
         ndisc_reset(nd);
         sd_ndisc_detach_event(nd);
-
-        LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes)
-                prefix = ndisc_prefix_unref(prefix);
-
         free(nd);
 
         return NULL;
 }
 
-int sd_ndisc_new(sd_ndisc **ret) {
+_public_ int sd_ndisc_new(sd_ndisc **ret) {
         _cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
 
         assert_return(ret, -EINVAL);
@@ -261,223 +163,70 @@ int sd_ndisc_new(sd_ndisc **ret) {
                 return -ENOMEM;
 
         nd->n_ref = 1;
-        nd->ifindex = -1;
         nd->fd = -1;
 
-        LIST_HEAD_INIT(nd->prefixes);
-
         *ret = nd;
         nd = NULL;
 
         return 0;
 }
 
-int sd_ndisc_get_mtu(sd_ndisc *nd, uint32_t *mtu) {
+_public_ int sd_ndisc_get_mtu(sd_ndisc *nd, uint32_t *mtu) {
         assert_return(nd, -EINVAL);
         assert_return(mtu, -EINVAL);
 
         if (nd->mtu == 0)
-                return -ENOMSG;
+                return -ENODATA;
 
         *mtu = nd->mtu;
         return 0;
 }
 
-static int prefix_match(const struct in6_addr *prefix, uint8_t prefixlen,
-                        const struct in6_addr *addr,
-                        uint8_t addr_prefixlen) {
-        uint8_t bytes, mask, len;
-
-        assert(prefix);
-        assert(addr);
-
-        len = MIN(prefixlen, addr_prefixlen);
-
-        bytes = len / 8;
-        mask = 0xff << (8 - len % 8);
+_public_ int sd_ndisc_get_hop_limit(sd_ndisc *nd, uint8_t *ret) {
+        assert_return(nd, -EINVAL);
+        assert_return(ret, -EINVAL);
 
-        if (memcmp(prefix, addr, bytes) != 0 ||
-            (prefix->s6_addr[bytes] & mask) != (addr->s6_addr[bytes] & mask))
-                return -EADDRNOTAVAIL;
+        if (nd->hop_limit == 0)
+                return -ENODATA;
 
+        *ret = nd->hop_limit;
         return 0;
 }
 
-static int ndisc_prefix_match(sd_ndisc *nd, const struct in6_addr *addr,
-                              uint8_t addr_len, NDiscPrefix **result) {
-        NDiscPrefix *prefix, *p;
-        usec_t time_now;
-        int r;
-
-        assert(nd);
-
-        r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
-        if (r < 0)
-                return r;
-
-        LIST_FOREACH_SAFE(prefixes, prefix, p, nd->prefixes) {
-                if (prefix->valid_until < time_now) {
-                        prefix = ndisc_prefix_unref(prefix);
-                        continue;
-                }
-
-                if (prefix_match(&prefix->addr, prefix->len, addr, addr_len) >= 0) {
-                        *result = prefix;
-                        return 0;
-                }
-        }
-
-        return -EADDRNOTAVAIL;
-}
-
-static int ndisc_prefix_update(sd_ndisc *nd, ssize_t len,
-                               const struct nd_opt_prefix_info *prefix_opt) {
-        NDiscPrefix *prefix;
-        uint32_t lifetime_valid, lifetime_preferred;
-        usec_t time_now;
-        char time_string[FORMAT_TIMESPAN_MAX];
+static int ndisc_handle_datagram(sd_ndisc *nd, sd_ndisc_router *rt) {
         int r;
 
         assert(nd);
-        assert(prefix_opt);
+        assert(rt);
 
-        if (len < prefix_opt->nd_opt_pi_len)
-                return -EBADMSG;
-
-        if (!(prefix_opt->nd_opt_pi_flags_reserved & (ND_OPT_PI_FLAG_ONLINK | ND_OPT_PI_FLAG_AUTO)))
+        r = ndisc_router_parse(rt);
+        if (r == -EBADMSG) /* Bad packet */
                 return 0;
-
-        if (in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &prefix_opt->nd_opt_pi_prefix) > 0)
-                return 0;
-
-        lifetime_valid = be32toh(prefix_opt->nd_opt_pi_valid_time);
-        lifetime_preferred = be32toh(prefix_opt->nd_opt_pi_preferred_time);
-
-        if (lifetime_valid < lifetime_preferred)
-                return 0;
-
-        r = ndisc_prefix_match(nd, &prefix_opt->nd_opt_pi_prefix,
-                               prefix_opt->nd_opt_pi_prefix_len, &prefix);
-        if (r < 0) {
-                if (r != -EADDRNOTAVAIL)
-                        return r;
-
-                /* if router advertisement prefix valid timeout is zero, the timeout
-                   callback will be called immediately to clean up the prefix */
-
-                r = ndisc_prefix_new(nd, &prefix);
-                if (r < 0)
-                        return r;
-
-                prefix->len = prefix_opt->nd_opt_pi_prefix_len;
-
-                memcpy(&prefix->addr, &prefix_opt->nd_opt_pi_prefix,
-                        sizeof(prefix->addr));
-
-                log_ndisc(nd, "New prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
-                          SD_NDISC_ADDRESS_FORMAT_VAL(prefix->addr),
-                          prefix->len, lifetime_valid,
-                          format_timespan(time_string, FORMAT_TIMESPAN_MAX, lifetime_valid * USEC_PER_SEC, USEC_PER_SEC));
-
-                LIST_PREPEND(prefixes, nd->prefixes, prefix);
-
-        } else {
-                if (prefix->len != prefix_opt->nd_opt_pi_prefix_len) {
-                        uint8_t prefixlen;
-
-                        prefixlen = MIN(prefix->len, prefix_opt->nd_opt_pi_prefix_len);
-
-                        log_ndisc(nd, "Prefix length mismatch %d/%d using %d",
-                                  prefix->len,
-                                  prefix_opt->nd_opt_pi_prefix_len,
-                                  prefixlen);
-
-                        prefix->len = prefixlen;
-                }
-
-                log_ndisc(nd, "Update prefix "SD_NDISC_ADDRESS_FORMAT_STR"/%d lifetime %d expires in %s",
-                          SD_NDISC_ADDRESS_FORMAT_VAL(prefix->addr),
-                          prefix->len, lifetime_valid,
-                          format_timespan(time_string, FORMAT_TIMESPAN_MAX, lifetime_valid * USEC_PER_SEC, USEC_PER_SEC));
-        }
-
-        r = sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now);
         if (r < 0)
-                return r;
-
-        prefix->valid_until = time_now + lifetime_valid * USEC_PER_SEC;
-
-        if ((prefix_opt->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK) && nd->prefix_onlink_callback)
-                nd->prefix_onlink_callback(nd, &prefix->addr, prefix->len, prefix->valid_until, nd->userdata);
-
-        if ((prefix_opt->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO) && nd->prefix_autonomous_callback)
-                nd->prefix_autonomous_callback(nd, &prefix->addr, prefix->len, lifetime_preferred, lifetime_valid,
-                                               nd->userdata);
-
-        return 0;
-}
-
-static int ndisc_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra, size_t len) {
-        struct nd_opt_hdr *opt_hdr;
-        void *opt;
-
-        assert(nd);
-        assert(ra);
-
-        if (len < sizeof(struct nd_router_advert) + NDISC_OPT_LEN_UNITS) {
-                log_ndisc(nd, "Router Advertisement below minimum length");
-                return -EBADMSG;
-        }
-
-        len -= sizeof(struct nd_router_advert);
-        opt = ra + 1;
-        opt_hdr = opt;
-
-        while (len != 0 && len >= opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS) {
-                struct nd_opt_mtu *opt_mtu;
-                struct nd_opt_prefix_info *opt_prefix;
-                uint32_t mtu;
-
-                if (opt_hdr->nd_opt_len == 0)
-                        return -EBADMSG;
-
-                switch (opt_hdr->nd_opt_type) {
-
-                case ND_OPT_MTU:
-                        opt_mtu = opt;
-
-                        mtu = be32toh(opt_mtu->nd_opt_mtu_mtu);
-
-                        if (mtu != nd->mtu) {
-                                nd->mtu = MAX(mtu, IP6_MIN_MTU);
-                                log_ndisc(nd, "Router Advertisement link MTU %d using %d", mtu, nd->mtu);
-                        }
-
-                        break;
-
-                case ND_OPT_PREFIX_INFORMATION:
-                        opt_prefix = opt;
-                        ndisc_prefix_update(nd, len, opt_prefix);
-                        break;
-                }
+                return 0;
 
-                len -= opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS;
-                opt = (void*) ((uint8_t*) opt + opt_hdr->nd_opt_len * NDISC_OPT_LEN_UNITS);
-                opt_hdr = opt;
-        }
+        /* Update global variables we keep */
+        if (rt->mtu > 0)
+                nd->mtu = rt->mtu;
+        if (rt->hop_limit > 0)
+                nd->hop_limit = rt->hop_limit;
 
-        if (len > 0)
-                log_ndisc(nd, "Router Advertisement contains %zd bytes of trailing garbage", len);
+        log_ndisc("Received Router Advertisement: flags %s preference %s lifetime %" PRIu16 " sec",
+                  rt->flags & ND_RA_FLAG_MANAGED ? "MANAGED" : rt->flags & ND_RA_FLAG_OTHER ? "OTHER" : "none",
+                  rt->preference == SD_NDISC_PREFERENCE_HIGH ? "high" : rt->preference == SD_NDISC_PREFERENCE_LOW ? "low" : "medium",
+                  rt->lifetime);
 
+        ndisc_callback(nd, SD_NDISC_EVENT_ROUTER, rt);
         return 0;
 }
 
-static int ndisc_router_advertisement_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        _cleanup_free_ struct nd_router_advert *ra = NULL;
+static int ndisc_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        _cleanup_(sd_ndisc_router_unrefp) sd_ndisc_router *rt = NULL;
         sd_ndisc *nd = userdata;
         union {
                 struct cmsghdr cmsghdr;
-                uint8_t buf[CMSG_LEN(sizeof(int))];
+                uint8_t buf[CMSG_SPACE(sizeof(int)) + /* ttl */
+                            CMSG_SPACE(sizeof(struct timeval))];
         } control = {};
         struct iovec iov = {};
         union sockaddr_union sa = {};
@@ -490,10 +239,7 @@ static int ndisc_router_advertisement_recv(sd_event_source *s, int fd, uint32_t
                 .msg_controllen = sizeof(control),
         };
         struct cmsghdr *cmsg;
-        struct in6_addr *gw;
-        unsigned lifetime;
         ssize_t len, buflen;
-        int r, pref, stateful;
 
         assert(s);
         assert(nd);
@@ -501,35 +247,47 @@ static int ndisc_router_advertisement_recv(sd_event_source *s, int fd, uint32_t
 
         buflen = next_datagram_size_fd(fd);
         if (buflen < 0)
-                return buflen;
-
-        iov.iov_len = buflen;
+                return log_ndisc_errno(buflen, "Failed to determine datagram size to read: %m");
 
-        ra = malloc(iov.iov_len);
-        if (!ra)
+        rt = ndisc_router_new(buflen);
+        if (!rt)
                 return -ENOMEM;
 
-        iov.iov_base = ra;
+        iov.iov_base = NDISC_ROUTER_RAW(rt);
+        iov.iov_len = rt->raw_size;
 
-        len = recvmsg(fd, &msg, 0);
+        len = recvmsg(fd, &msg, MSG_DONTWAIT);
         if (len < 0) {
                 if (errno == EAGAIN || errno == EINTR)
                         return 0;
 
-                return log_ndisc_errno(nd, errno, "Could not receive message from ICMPv6 socket: %m");
+                return log_ndisc_errno(errno, "Could not receive message from ICMPv6 socket: %m");
         }
-        if ((size_t) len < sizeof(struct nd_router_advert)) {
-                log_ndisc(nd, "Too small to be a router advertisement: ignoring");
-                return 0;
+
+        if ((size_t) len != rt->raw_size) {
+                log_ndisc("Packet size mismatch.");
+                return -EINVAL;
         }
 
-        if (msg.msg_namelen == 0)
-                gw = NULL; /* only happens when running the test-suite over a socketpair */
-        else if (msg.msg_namelen != sizeof(sa.in6)) {
-                log_ndisc(nd, "Received invalid source address size from ICMPv6 socket: %zu bytes", (size_t)msg.msg_namelen);
-                return 0;
-        } else
-                gw = &sa.in6.sin6_addr;
+        if (msg.msg_namelen == sizeof(struct sockaddr_in6) &&
+            sa.in6.sin6_family == AF_INET6)  {
+
+                if (in_addr_is_link_local(AF_INET6, (union in_addr_union*) &sa.in6.sin6_addr) <= 0) {
+                        _cleanup_free_ char *addr = NULL;
+
+                        (void) in_addr_to_string(AF_INET6, (union in_addr_union*) &sa.in6.sin6_addr, &addr);
+                        log_ndisc("Received RA from non-link-local address %s. Ignoring.", strna(addr));
+                        return 0;
+                }
+
+                rt->address = sa.in6.sin6_addr;
+
+        } else if (msg.msg_namelen > 0) {
+                log_ndisc("Received invalid source address size from ICMPv6 socket: %zu bytes", (size_t) msg.msg_namelen);
+                return -EINVAL;
+        }
+
+        /* namelen == 0 only happens when running the test-suite over a socketpair */
 
         assert(!(msg.msg_flags & MSG_CTRUNC));
         assert(!(msg.msg_flags & MSG_TRUNC));
@@ -538,61 +296,29 @@ static int ndisc_router_advertisement_recv(sd_event_source *s, int fd, uint32_t
                 if (cmsg->cmsg_level == SOL_IPV6 &&
                     cmsg->cmsg_type == IPV6_HOPLIMIT &&
                     cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
-                        int hops = *(int*)CMSG_DATA(cmsg);
+                        int hops = *(int*) CMSG_DATA(cmsg);
 
                         if (hops != 255) {
-                                log_ndisc(nd, "Received RA with invalid hop limit %d. Ignoring.", hops);
+                                log_ndisc("Received RA with invalid hop limit %d. Ignoring.", hops);
                                 return 0;
                         }
-
-                        break;
                 }
-        }
 
-        if (gw && !in_addr_is_link_local(AF_INET6, (const union in_addr_union*) gw)) {
-                _cleanup_free_ char *addr = NULL;
-
-                (void)in_addr_to_string(AF_INET6, (const union in_addr_union*) gw, &addr);
-
-                log_ndisc(nd, "Received RA from non-link-local address %s. Ignoring.", strna(addr));
-                return 0;
+                if (cmsg->cmsg_level == SOL_SOCKET &&
+                    cmsg->cmsg_type == SO_TIMESTAMP &&
+                    cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
+                        triple_timestamp_from_realtime(&rt->timestamp, timeval_load(CMSG_DATA(cmsg)));
         }
 
-        if (ra->nd_ra_type != ND_ROUTER_ADVERT)
-                return 0;
-
-        if (ra->nd_ra_code != 0)
-                return 0;
+        if (!triple_timestamp_is_set(&rt->timestamp))
+                triple_timestamp_get(&rt->timestamp);
 
         nd->timeout_event_source = sd_event_source_unref(nd->timeout_event_source);
-        nd->state = NDISC_STATE_ADVERTISEMENT_LISTEN;
-
-        stateful = ra->nd_ra_flags_reserved & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER);
-        pref = (ra->nd_ra_flags_reserved & ND_RA_FLAG_PREF) >> 3;
-
-        if (!IN_SET(pref, ND_RA_FLAG_PREF_LOW, ND_RA_FLAG_PREF_HIGH))
-                pref = ND_RA_FLAG_PREF_MEDIUM;
-
-        lifetime = be16toh(ra->nd_ra_router_lifetime);
-
-        log_ndisc(nd, "Received Router Advertisement: flags %s preference %s lifetime %u sec",
-                  stateful & ND_RA_FLAG_MANAGED ? "MANAGED" : stateful & ND_RA_FLAG_OTHER ? "OTHER" : "none",
-                  pref == ND_RA_FLAG_PREF_HIGH ? "high" : pref == ND_RA_FLAG_PREF_LOW ? "low" : "medium",
-                  lifetime);
 
-        r = ndisc_ra_parse(nd, ra, (size_t) len);
-        if (r < 0) {
-                log_ndisc_errno(nd, r, "Could not parse Router Advertisement: %m");
-                return 0;
-        }
-
-        if (nd->router_callback)
-                nd->router_callback(nd, stateful, gw, lifetime, pref, nd->userdata);
-
-        return 0;
+        return ndisc_handle_datagram(nd, rt);
 }
 
-static int ndisc_router_solicitation_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
+static int ndisc_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
         sd_ndisc *nd = userdata;
         usec_t time_now, next_timeout;
         int r;
@@ -601,43 +327,34 @@ static int ndisc_router_solicitation_timeout(sd_event_source *s, uint64_t usec,
         assert(nd);
         assert(nd->event);
 
-        nd->timeout_event_source = sd_event_source_unref(nd->timeout_event_source);
-
         if (nd->nd_sent >= NDISC_MAX_ROUTER_SOLICITATIONS) {
-                if (nd->callback)
-                        nd->callback(nd, SD_NDISC_EVENT_TIMEOUT, nd->userdata);
-                nd->state = NDISC_STATE_ADVERTISEMENT_LISTEN;
-        } else {
-                r = icmp6_send_router_solicitation(nd->fd, &nd->mac_addr);
-                if (r < 0) {
-                        log_ndisc_errno(nd, r, "Error sending Router Solicitation: %m");
-                        goto fail;
-                } else {
-                        nd->state = NDISC_STATE_SOLICITATION_SENT;
-                        log_ndisc(nd, "Sent Router Solicitation");
-                }
-
-                nd->nd_sent++;
+                nd->timeout_event_source = sd_event_source_unref(nd->timeout_event_source);
+                ndisc_callback(nd, SD_NDISC_EVENT_TIMEOUT, NULL);
+                return 0;
+        }
 
-                assert_se(sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now) >= 0);
+        r = icmp6_send_router_solicitation(nd->fd, &nd->mac_addr);
+        if (r < 0) {
+                log_ndisc_errno(r, "Error sending Router Solicitation: %m");
+                goto fail;
+        }
 
-                next_timeout = time_now + NDISC_ROUTER_SOLICITATION_INTERVAL;
+        log_ndisc("Sent Router Solicitation");
+        nd->nd_sent++;
 
-                r = sd_event_add_time(nd->event, &nd->timeout_event_source, clock_boottime_or_monotonic(),
-                                      next_timeout, 0,
-                                      ndisc_router_solicitation_timeout, nd);
-                if (r < 0) {
-                        log_ndisc_errno(nd, r, "Failed to allocate timer event: %m");
-                        goto fail;
-                }
+        assert_se(sd_event_now(nd->event, clock_boottime_or_monotonic(), &time_now) >= 0);
+        next_timeout = time_now + NDISC_ROUTER_SOLICITATION_INTERVAL;
 
-                r = sd_event_source_set_priority(nd->timeout_event_source, nd->event_priority);
-                if (r < 0) {
-                        log_ndisc_errno(nd, r, "Cannot set timer priority: %m");
-                        goto fail;
-                }
+        r = sd_event_source_set_time(nd->timeout_event_source, next_timeout);
+        if (r < 0) {
+                log_ndisc_errno(r, "Error updating timer: %m");
+                goto fail;
+        }
 
-                (void) sd_event_source_set_description(nd->timeout_event_source, "ndisc-timeout");
+        r = sd_event_source_set_enabled(nd->timeout_event_source, SD_EVENT_ONESHOT);
+        if (r < 0) {
+                log_ndisc_errno(r, "Error reenabling timer: %m");
+                goto fail;
         }
 
         return 0;
@@ -647,38 +364,36 @@ fail:
         return 0;
 }
 
-int sd_ndisc_stop(sd_ndisc *nd) {
+_public_ int sd_ndisc_stop(sd_ndisc *nd) {
         assert_return(nd, -EINVAL);
 
-        if (nd->state == NDISC_STATE_IDLE)
+        if (nd->fd < 0)
                 return 0;
 
-        log_ndisc(nd, "Stopping IPv6 Router Solicitation client");
+        log_ndisc("Stopping IPv6 Router Solicitation client");
 
         ndisc_reset(nd);
-        nd->state = NDISC_STATE_IDLE;
-
-        if (nd->callback)
-                nd->callback(nd, SD_NDISC_EVENT_STOP, nd->userdata);
-
-        return 0;
+        return 1;
 }
 
-int sd_ndisc_router_discovery_start(sd_ndisc *nd) {
+_public_ int sd_ndisc_start(sd_ndisc *nd) {
         int r;
 
         assert_return(nd, -EINVAL);
         assert_return(nd->event, -EINVAL);
         assert_return(nd->ifindex > 0, -EINVAL);
-        assert_return(nd->state == NDISC_STATE_IDLE, -EBUSY);
 
-        r = icmp6_bind_router_solicitation(nd->ifindex);
-        if (r < 0)
-                return r;
+        if (nd->fd >= 0)
+                return 0;
 
-        nd->fd = r;
+        assert(!nd->recv_event_source);
+        assert(!nd->timeout_event_source);
 
-        r = sd_event_add_io(nd->event, &nd->recv_event_source, nd->fd, EPOLLIN, ndisc_router_advertisement_recv, nd);
+        nd->fd = icmp6_bind_router_solicitation(nd->ifindex);
+        if (nd->fd < 0)
+                return nd->fd;
+
+        r = sd_event_add_io(nd->event, &nd->recv_event_source, nd->fd, EPOLLIN, ndisc_recv, nd);
         if (r < 0)
                 goto fail;
 
@@ -688,7 +403,7 @@ int sd_ndisc_router_discovery_start(sd_ndisc *nd) {
 
         (void) sd_event_source_set_description(nd->recv_event_source, "ndisc-receive-message");
 
-        r = sd_event_add_time(nd->event, &nd->timeout_event_source, clock_boottime_or_monotonic(), 0, 0, ndisc_router_solicitation_timeout, nd);
+        r = sd_event_add_time(nd->event, &nd->timeout_event_source, clock_boottime_or_monotonic(), 0, 0, ndisc_timeout, nd);
         if (r < 0)
                 goto fail;
 
@@ -698,8 +413,8 @@ int sd_ndisc_router_discovery_start(sd_ndisc *nd) {
 
         (void) sd_event_source_set_description(nd->timeout_event_source, "ndisc-timeout");
 
-        log_ndisc(ns, "Started IPv6 Router Solicitation client");
-        return 0;
+        log_ndisc("Started IPv6 Router Solicitation client");
+        return 1;
 
 fail:
         ndisc_reset(nd);
diff --git a/src/libsystemd-network/test-lldp.c b/src/libsystemd-network/test-lldp.c
index 1aae2253c0..6bcd65de0a 100644
--- a/src/libsystemd-network/test-lldp.c
+++ b/src/libsystemd-network/test-lldp.c
@@ -54,11 +54,11 @@ static void lldp_handler(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n
 static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_callback_t cb, void *cb_data) {
         int r;
 
-        r = sd_lldp_new(lldp, 42);
+        r = sd_lldp_new(lldp);
         if (r < 0)
                 return r;
 
-        r = sd_lldp_attach_event(*lldp, e, 0);
+        r = sd_lldp_set_ifindex(*lldp, 42);
         if (r < 0)
                 return r;
 
@@ -66,6 +66,10 @@ static int start_lldp(sd_lldp **lldp, sd_event *e, sd_lldp_callback_t cb, void *
         if (r < 0)
                 return r;
 
+        r = sd_lldp_attach_event(*lldp, e, 0);
+        if (r < 0)
+                return r;
+
         r = sd_lldp_start(*lldp);
         if (r < 0)
                 return r;
diff --git a/src/libsystemd-network/test-ndisc-rs.c b/src/libsystemd-network/test-ndisc-rs.c
index 4817c968ac..d9669488be 100644
--- a/src/libsystemd-network/test-ndisc-rs.c
+++ b/src/libsystemd-network/test-ndisc-rs.c
@@ -18,11 +18,15 @@
 ***/
 
 #include <netinet/icmp6.h>
+#include <arpa/inet.h>
 
 #include "sd-ndisc.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 = {'A', 'B', 'C', '1', '2', '3'}
@@ -35,6 +39,144 @@ static int test_fd[2];
 typedef int (*send_ra_t)(uint8_t flags);
 static send_ra_t send_ra_function;
 
+static void router_dump(sd_ndisc_router *rt) {
+        struct in6_addr addr;
+        char buf[FORMAT_TIMESTAMP_MAX];
+        uint8_t hop_limit;
+        uint64_t t, flags;
+        uint32_t mtu;
+        uint16_t lifetime;
+        unsigned preference;
+        int r;
+
+        assert_se(rt);
+
+        log_info("--");
+        assert_se(sd_ndisc_router_get_address(rt, &addr) == -ENODATA);
+
+        assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
+        log_info("Timestamp: %s", format_timestamp(buf, sizeof(buf), 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);
+        log_info("Lifetime: %" PRIu16, lifetime);
+
+        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 void *p;
+                        size_t n;
+
+                        assert_se(sd_ndisc_router_option_get_raw(rt, &p, &n) >= 0);
+                        assert_se(n > 2);
+                        assert_se(c = hexmem((uint8_t*) p + 2, n - 2));
+
+                        log_info("Address: %s", c);
+                        break;
+                }
+
+                case SD_NDISC_OPTION_PREFIX_INFORMATION: {
+                        uint32_t lifetime_valid, lifetime_preferred;
+                        unsigned prefix_len;
+                        uint8_t pfl;
+                        struct in6_addr a;
+                        char buff[INET6_ADDRSTRLEN];
+
+                        assert_se(sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid) >= 0);
+                        log_info("Valid Lifetime: %" PRIu32, lifetime_valid);
+
+                        assert_se(sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred) >= 0);
+                        log_info("Preferred Lifetime: %" PRIu32, lifetime_preferred);
+
+                        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", inet_ntop(AF_INET6, &a, buff, sizeof(buff)));
+
+                        break;
+                }
+
+                case SD_NDISC_OPTION_RDNSS: {
+                        const struct in6_addr *a;
+                        uint32_t lt;
+                        int n, i;
+
+                        n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
+                        assert_se(n > 0);
+
+                        for (i = 0; i < n; i++) {
+                                char buff[INET6_ADDRSTRLEN];
+                                log_info("DNS: %s", inet_ntop(AF_INET6, a + i, buff, sizeof(buff)));
+                        }
+
+                        assert_se(sd_ndisc_router_rdnss_get_lifetime(rt, &lt) >= 0);
+                        log_info("Lifetime: %" PRIu32, lt);
+                        break;
+                }
+
+                case SD_NDISC_OPTION_DNSSL: {
+                        _cleanup_strv_free_ char **l = NULL;
+                        uint32_t lt;
+                        int n, i;
+
+                        n = sd_ndisc_router_dnssl_get_domains(rt, &l);
+                        assert_se(n > 0);
+
+                        for (i = 0; i < n; i++)
+                                log_info("Domain: %s", l[i]);
+
+                        assert_se(sd_ndisc_router_dnssl_get_lifetime(rt, &lt) >= 0);
+                        log_info("Lifetime: %" PRIu32, lt);
+                        break;
+                }}
+
+                r = sd_ndisc_router_option_next(rt);
+        }
+}
+
 static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
                              void *userdata) {
         assert_se(false);
@@ -83,32 +225,39 @@ int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
         return send_ra_function(0);
 }
 
-static void test_rs_done(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata) {
+static void test_callback(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *rt, void *userdata) {
         sd_event *e = userdata;
         static unsigned idx = 0;
-        uint8_t flags_array[] = {
+        uint64_t flags_array[] = {
                 0,
                 0,
                 0,
                 ND_RA_FLAG_OTHER,
                 ND_RA_FLAG_MANAGED
         };
+        uint64_t flags;
         uint32_t mtu;
 
         assert_se(nd);
 
+        if (event != SD_NDISC_EVENT_ROUTER)
+                return;
+
+        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%02x\n", flags);
+                printf("  got event 0x%02" PRIx64 "\n", flags);
 
         if (idx < ELEMENTSOF(flags_array)) {
                 send_ra(flags_array[idx]);
                 return;
         }
 
-        assert_se(sd_ndisc_get_mtu(nd, &mtu) == -ENOMSG);
+        assert_se(sd_ndisc_get_mtu(nd, &mtu) == -ENODATA);
 
         sd_event_exit(e, 0);
 }
@@ -132,17 +281,17 @@ static void test_rs(void) {
 
         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_rs_done, NULL, NULL, NULL, e) >= 0);
+        assert_se(sd_ndisc_set_callback(nd, test_callback, e) >= 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_ndisc_stop(nd) >= 0);
-        assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
+        assert_se(sd_ndisc_start(nd) >= 0);
         assert_se(sd_ndisc_stop(nd) >= 0);
 
-        assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
+        assert_se(sd_ndisc_start(nd) >= 0);
 
         sd_event_loop(e);
 
diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index 7ba6527f63..f364b54b50 100644
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -216,8 +216,7 @@ struct sd_event {
         pid_t original_pid;
 
         unsigned iteration;
-        dual_timestamp timestamp;
-        usec_t timestamp_boottime;
+        triple_timestamp timestamp;
         int state;
 
         bool exit_requested:1;
@@ -1072,16 +1071,16 @@ _public_ int sd_event_add_time(
         assert_return(e->state != SD_EVENT_FINISHED, -ESTALE);
         assert_return(!event_pid_changed(e), -ECHILD);
 
-        if (IN_SET(clock, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) &&
-            !clock_boottime_supported())
+        if (!clock_supported(clock)) /* Checks whether the kernel supports the clock */
+                return -EOPNOTSUPP;
+
+        type = clock_to_event_source_type(clock); /* checks whether sd-event supports this clock */
+        if (type < 0)
                 return -EOPNOTSUPP;
 
         if (!callback)
                 callback = time_exit_callback;
 
-        type = clock_to_event_source_type(clock);
-        assert_return(type >= 0, -EOPNOTSUPP);
-
         d = event_get_clock_data(e, type);
         assert(d);
 
@@ -2530,9 +2529,7 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
                 goto finish;
         }
 
-        dual_timestamp_get(&e->timestamp);
-        if (clock_boottime_supported())
-                e->timestamp_boottime = now(CLOCK_BOOTTIME);
+        triple_timestamp_get(&e->timestamp);
 
         for (i = 0; i < m; i++) {
 
@@ -2573,7 +2570,7 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
         if (r < 0)
                 goto finish;
 
-        r = process_timer(e, e->timestamp_boottime, &e->boottime);
+        r = process_timer(e, e->timestamp.boottime, &e->boottime);
         if (r < 0)
                 goto finish;
 
@@ -2585,7 +2582,7 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
         if (r < 0)
                 goto finish;
 
-        r = process_timer(e, e->timestamp_boottime, &e->boottime_alarm);
+        r = process_timer(e, e->timestamp.boottime, &e->boottime_alarm);
         if (r < 0)
                 goto finish;
 
@@ -2759,43 +2756,24 @@ _public_ int sd_event_now(sd_event *e, clockid_t clock, uint64_t *usec) {
         assert_return(e, -EINVAL);
         assert_return(usec, -EINVAL);
         assert_return(!event_pid_changed(e), -ECHILD);
-        assert_return(IN_SET(clock,
-                             CLOCK_REALTIME,
-                             CLOCK_REALTIME_ALARM,
-                             CLOCK_MONOTONIC,
-                             CLOCK_BOOTTIME,
-                             CLOCK_BOOTTIME_ALARM), -EOPNOTSUPP);
 
+        if (!TRIPLE_TIMESTAMP_HAS_CLOCK(clock))
+                return -EOPNOTSUPP;
+
+        /* Generate a clean error in case CLOCK_BOOTTIME is not available. Note that don't use clock_supported() here,
+         * for a reason: there are systems where CLOCK_BOOTTIME is supported, but CLOCK_BOOTTIME_ALARM is not, but for
+         * the purpose of getting the time this doesn't matter. */
         if (IN_SET(clock, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) && !clock_boottime_supported())
                 return -EOPNOTSUPP;
 
-        if (!dual_timestamp_is_set(&e->timestamp)) {
+        if (!triple_timestamp_is_set(&e->timestamp)) {
                 /* Implicitly fall back to now() if we never ran
                  * before and thus have no cached time. */
                 *usec = now(clock);
                 return 1;
         }
 
-        switch (clock) {
-
-        case CLOCK_REALTIME:
-        case CLOCK_REALTIME_ALARM:
-                *usec = e->timestamp.realtime;
-                break;
-
-        case CLOCK_MONOTONIC:
-                *usec = e->timestamp.monotonic;
-                break;
-
-        case CLOCK_BOOTTIME:
-        case CLOCK_BOOTTIME_ALARM:
-                *usec = e->timestamp_boottime;
-                break;
-
-        default:
-                assert_not_reached("Unknown clock?");
-        }
-
+        *usec = triple_timestamp_by_clock(&e->timestamp, clock);
         return 0;
 }
 
diff --git a/src/network/networkd-dhcp6.c b/src/network/networkd-dhcp6.c
index 50721b1c74..15acf56a5f 100644
--- a/src/network/networkd-dhcp6.c
+++ b/src/network/networkd-dhcp6.c
@@ -60,10 +60,15 @@ static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
         return 1;
 }
 
-static int dhcp6_address_change(Link *link, struct in6_addr *ip6_addr,
-                                uint32_t lifetime_preferred, uint32_t lifetime_valid) {
-        int r;
+static int dhcp6_address_change(
+                Link *link,
+                struct in6_addr *ip6_addr,
+                uint32_t lifetime_preferred,
+                uint32_t lifetime_valid) {
+
         _cleanup_address_free_ Address *addr = NULL;
+        char buffer[INET6_ADDRSTRLEN];
+        int r;
 
         r = address_new(&addr);
         if (r < 0)
@@ -79,8 +84,8 @@ static int dhcp6_address_change(Link *link, struct in6_addr *ip6_addr,
         addr->cinfo.ifa_valid = lifetime_valid;
 
         log_link_info(link,
-                      "DHCPv6 address "SD_NDISC_ADDRESS_FORMAT_STR"/%d timeout preferred %d valid %d",
-                      SD_NDISC_ADDRESS_FORMAT_VAL(addr->in_addr.in6),
+                      "DHCPv6 address %s/%d timeout preferred %d valid %d",
+                      inet_ntop(AF_INET6, &addr->in_addr.in6, buffer, sizeof(buffer)),
                       addr->prefixlen, lifetime_preferred, lifetime_valid);
 
         r = address_configure(addr, link, dhcp6_address_handler, true);
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index ee52b1ce1e..11628339b9 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -28,8 +28,9 @@
 #include "fileio.h"
 #include "netlink-util.h"
 #include "network-internal.h"
-#include "networkd.h"
 #include "networkd-lldp-tx.h"
+#include "networkd-ndisc.h"
+#include "networkd.h"
 #include "set.h"
 #include "socket-util.h"
 #include "stdio-util.h"
@@ -504,7 +505,10 @@ static void link_free(Link *link) {
 
         sd_ipv4ll_unref(link->ipv4ll);
         sd_dhcp6_client_unref(link->dhcp6_client);
-        sd_ndisc_unref(link->ndisc_router_discovery);
+        sd_ndisc_unref(link->ndisc);
+
+        set_free_free(link->ndisc_rdnss);
+        set_free_free(link->ndisc_dnssl);
 
         if (link->manager)
                 hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
@@ -616,8 +620,8 @@ static int link_stop_clients(Link *link) {
                         r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
         }
 
-        if (link->ndisc_router_discovery) {
-                k = sd_ndisc_stop(link->ndisc_router_discovery);
+        if (link->ndisc) {
+                k = sd_ndisc_stop(link->ndisc);
                 if (k < 0)
                         r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
         }
@@ -1453,11 +1457,11 @@ static int link_acquire_ipv6_conf(Link *link) {
         }
 
         if (link_ipv6_accept_ra_enabled(link)) {
-                assert(link->ndisc_router_discovery);
+                assert(link->ndisc);
 
                 log_link_debug(link, "Discovering IPv6 routers");
 
-                r = sd_ndisc_router_discovery_start(link->ndisc_router_discovery);
+                r = sd_ndisc_start(link->ndisc);
                 if (r < 0 && r != -EBUSY)
                         return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
         }
@@ -2364,7 +2368,11 @@ static int link_configure(Link *link) {
         }
 
         if (link_lldp_rx_enabled(link)) {
-                r = sd_lldp_new(&link->lldp, link->ifindex);
+                r = sd_lldp_new(&link->lldp);
+                if (r < 0)
+                        return r;
+
+                r = sd_lldp_set_ifindex(link->lldp, link->ifindex);
                 if (r < 0)
                         return r;
 
@@ -3083,6 +3091,22 @@ int link_save(Link *link) {
                                 if (space)
                                         fputc(' ', f);
                                 serialize_in6_addrs(f, in6_addrs, r);
+                                space = true;
+                        }
+                }
+
+                /* Make sure to flush out old entries before we use the NDISC data */
+                ndisc_vacuum(link);
+
+                if (link->network->dhcp_use_dns && link->ndisc_rdnss) {
+                        NDiscRDNSS *dd;
+
+                        SET_FOREACH(dd, link->ndisc_rdnss, i) {
+                                if (space)
+                                        fputc(' ', f);
+
+                                serialize_in6_addrs(f, &dd->address, 1);
+                                space = true;
                         }
                 }
 
@@ -3128,7 +3152,6 @@ int link_save(Link *link) {
                 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
                         if (link->dhcp_lease)
                                 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
-
                         if (dhcp6_lease)
                                 (void) sd_dhcp6_lease_get_domains(dhcp6_lease, &dhcp6_domains);
                 }
@@ -3136,22 +3159,34 @@ int link_save(Link *link) {
                 fputs("DOMAINS=", f);
                 fputstrv(f, link->network->search_domains, NULL, &space);
 
-                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES && dhcp_domainname)
-                        fputs_with_space(f, dhcp_domainname, NULL, &space);
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
+                        NDiscDNSSL *dd;
+
+                        if (dhcp_domainname)
+                                fputs_with_space(f, dhcp_domainname, NULL, &space);
+                        if (dhcp6_domains)
+                                fputstrv(f, dhcp6_domains, NULL, &space);
 
-                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES && dhcp6_domains)
-                        fputstrv(f, dhcp6_domains, NULL, &space);
+                        SET_FOREACH(dd, link->ndisc_dnssl, i)
+                                fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
+                }
 
                 fputc('\n', f);
 
                 fputs("ROUTE_DOMAINS=", f);
                 fputstrv(f, link->network->route_domains, NULL, NULL);
 
-                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE && dhcp_domainname)
-                        fputs_with_space(f, dhcp_domainname, NULL, &space);
+                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
+                        NDiscDNSSL *dd;
 
-                if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE && dhcp6_domains)
-                        fputstrv(f, dhcp6_domains, NULL, &space);
+                        if (dhcp_domainname)
+                                fputs_with_space(f, dhcp_domainname, NULL, &space);
+                        if (dhcp6_domains)
+                                fputstrv(f, dhcp6_domains, NULL, &space);
+
+                        SET_FOREACH(dd, link->ndisc_dnssl, i)
+                                fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
+                }
 
                 fputc('\n', f);
 
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h
index 5efefd27d6..7db94e79e8 100644
--- a/src/network/networkd-link.h
+++ b/src/network/networkd-link.h
@@ -98,6 +98,7 @@ typedef struct Link {
         unsigned dhcp4_messages;
         bool dhcp4_configured;
         bool dhcp6_configured;
+
         unsigned ndisc_messages;
         bool ndisc_configured;
 
@@ -111,7 +112,10 @@ typedef struct Link {
 
         sd_dhcp_server *dhcp_server;
 
-        sd_ndisc *ndisc_router_discovery;
+        sd_ndisc *ndisc;
+        Set *ndisc_rdnss;
+        Set *ndisc_dnssl;
+
         sd_dhcp6_client *dhcp6_client;
         bool rtnl_extended_attrs;
 
@@ -161,7 +165,6 @@ int ipv4ll_configure(Link *link);
 int dhcp4_configure(Link *link);
 int dhcp6_configure(Link *link);
 int dhcp6_request_address(Link *link, int ir);
-int ndisc_configure(Link *link);
 
 const char* link_state_to_string(LinkState s) _const_;
 LinkState link_state_from_string(const char *s) _pure_;
diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
index a0d4fa77d8..2a1ba2bac7 100644
--- a/src/network/networkd-ndisc.c
+++ b/src/network/networkd-ndisc.c
@@ -17,14 +17,15 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <netinet/ether.h>
 #include <netinet/icmp6.h>
-#include <netinet/in.h>
-#include <linux/if.h>
 
 #include "sd-ndisc.h"
 
 #include "networkd.h"
+#include "networkd-ndisc.h"
+
+#define NDISC_DNSSL_MAX 64U
+#define NDISC_RDNSS_MAX 64U
 
 static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
         _cleanup_link_unref_ Link *link = userdata;
@@ -49,19 +50,92 @@ static int ndisc_netlink_handler(sd_netlink *rtnl, sd_netlink_message *m, void *
         return 1;
 }
 
-static void ndisc_prefix_autonomous_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen,
-                                            unsigned lifetime_preferred, unsigned lifetime_valid, void *userdata) {
-        _cleanup_address_free_ Address *address = NULL;
-        Link *link = userdata;
+static void ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
+        _cleanup_route_free_ Route *route = NULL;
+        struct in6_addr gateway;
+        uint16_t lifetime;
+        unsigned preference;
         usec_t time_now;
         int r;
 
-        assert(nd);
         assert(link);
-        assert(link->network);
+        assert(rt);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+        r = sd_ndisc_router_get_lifetime(rt, &lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
+                return;
+        }
+        if (lifetime == 0) /* not a default router */
+                return;
+
+        r = sd_ndisc_router_get_address(rt, &gateway);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_get_preference(rt, &preference);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
+                return;
+        }
+
+        r = route_new(&route);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Could not allocate route: %m");
+                return;
+        }
+
+        route->family = AF_INET6;
+        route->table = RT_TABLE_MAIN;
+        route->protocol = RTPROT_RA;
+        route->pref = preference;
+        route->gw.in6 = gateway;
+        route->lifetime = time_now + lifetime * USEC_PER_SEC;
+
+        r = route_configure(route, link, ndisc_netlink_handler);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Could not set default route: %m");
+                link_enter_failed(link);
+                return;
+        }
+
+        link->ndisc_messages++;
+}
+
+static void ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *rt) {
+        _cleanup_address_free_ Address *address = NULL;
+        uint32_t lifetime_valid, lifetime_preferred;
+        unsigned prefixlen;
+        int r;
+
+        assert(link);
+        assert(rt);
+
+        r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix length: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix valid lifetime: %m");
                 return;
+        }
+
+        r = sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix preferred lifetime: %m");
+                return;
+        }
 
         r = address_new(&address);
         if (r < 0) {
@@ -69,10 +143,13 @@ static void ndisc_prefix_autonomous_handler(sd_ndisc *nd, const struct in6_addr
                 return;
         }
 
-        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
-
         address->family = AF_INET6;
-        address->in_addr.in6 = *prefix;
+        r = sd_ndisc_router_prefix_get_address(rt, &address->in_addr.in6);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix address: %m");
+                return;
+        }
+
         if (in_addr_is_null(AF_INET6, (const union in_addr_union *) &link->network->ipv6_token) == 0)
                 memcpy(((char *)&address->in_addr.in6) + 8, ((char *)&link->network->ipv6_token) + 8, 8);
         else {
@@ -102,17 +179,33 @@ static void ndisc_prefix_autonomous_handler(sd_ndisc *nd, const struct in6_addr
         link->ndisc_messages++;
 }
 
-static void ndisc_prefix_onlink_handler(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen, unsigned lifetime, void *userdata) {
+static void ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
         _cleanup_route_free_ Route *route = NULL;
-        Link *link = userdata;
         usec_t time_now;
+        uint32_t lifetime;
+        unsigned prefixlen;
         int r;
 
-        assert(nd);
         assert(link);
+        assert(rt);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
                 return;
+        }
+
+        r = sd_ndisc_router_prefix_get_prefixlen(rt, &prefixlen);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix length: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix lifetime: %m");
+                return;
+        }
 
         r = route_new(&route);
         if (r < 0) {
@@ -120,16 +213,19 @@ static void ndisc_prefix_onlink_handler(sd_ndisc *nd, const struct in6_addr *pre
                 return;
         }
 
-        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
-
         route->family = AF_INET6;
         route->table = RT_TABLE_MAIN;
         route->protocol = RTPROT_RA;
         route->flags = RTM_F_PREFIX;
-        route->dst.in6 = *prefix;
         route->dst_prefixlen = prefixlen;
         route->lifetime = time_now + lifetime * USEC_PER_SEC;
 
+        r = sd_ndisc_router_prefix_get_address(rt, &route->dst.in6);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get prefix address: %m");
+                return;
+        }
+
         r = route_configure(route, link, ndisc_netlink_handler);
         if (r < 0) {
                 log_link_warning_errno(link, r, "Could not set prefix route: %m");
@@ -140,32 +236,47 @@ static void ndisc_prefix_onlink_handler(sd_ndisc *nd, const struct in6_addr *pre
         link->ndisc_messages++;
 }
 
-static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata) {
+static void ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
         _cleanup_route_free_ Route *route = NULL;
-        Link *link = userdata;
+        struct in6_addr gateway;
+        uint32_t lifetime;
+        unsigned preference, prefixlen;
         usec_t time_now;
         int r;
 
         assert(link);
-        assert(link->network);
-        assert(link->manager);
-        assert(link->dhcp6_client);
-        assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+        r = sd_ndisc_router_route_get_lifetime(rt, &lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
+                return;
+        }
+        if (lifetime == 0)
                 return;
 
-        if (flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) {
-                /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags */
-                r = dhcp6_request_address(link, flags & ND_RA_FLAG_MANAGED ? false : true);
-                if (r < 0 && r != -EBUSY)
-                        log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m");
-                else
-                        log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request");
+        r = sd_ndisc_router_get_address(rt, &gateway);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get gateway address from RA: %m");
+                return;
         }
 
-        if (!gateway)
+        r = sd_ndisc_router_route_get_prefixlen(rt, &prefixlen);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get route prefix length: %m");
                 return;
+        }
+
+        r = sd_ndisc_router_route_get_preference(rt, &preference);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
+                return;
+        }
 
         r = route_new(&route);
         if (r < 0) {
@@ -173,18 +284,23 @@ static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_a
                 return;
         }
 
-        assert_se(sd_event_now(link->manager->event, clock_boottime_or_monotonic(), &time_now) >= 0);
-
         route->family = AF_INET6;
         route->table = RT_TABLE_MAIN;
         route->protocol = RTPROT_RA;
-        route->pref = pref;
-        route->gw.in6 = *gateway;
+        route->pref = preference;
+        route->gw.in6 = gateway;
+        route->dst_prefixlen = prefixlen;
         route->lifetime = time_now + lifetime * USEC_PER_SEC;
 
+        r = sd_ndisc_router_route_get_address(rt, &route->dst.in6);
+        if (r < 0) {
+                log_link_error_errno(link, r, "Failed to get route address: %m");
+                return;
+        }
+
         r = route_configure(route, link, ndisc_netlink_handler);
         if (r < 0) {
-                log_link_warning_errno(link, r, "Could not set default route: %m");
+                log_link_warning_errno(link, r, "Could not set additional route: %m");
                 link_enter_failed(link);
                 return;
         }
@@ -192,7 +308,290 @@ static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_a
         link->ndisc_messages++;
 }
 
-static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) {
+static void ndisc_rdnss_hash_func(const void *p, struct siphash *state) {
+        const NDiscRDNSS *x = p;
+
+        siphash24_compress(&x->address, sizeof(x->address), state);
+}
+
+static int ndisc_rdnss_compare_func(const void *_a, const void *_b) {
+        const NDiscRDNSS *a = _a, *b = _b;
+
+        return memcmp(&a->address, &b->address, sizeof(a->address));
+}
+
+static const struct hash_ops ndisc_rdnss_hash_ops = {
+        .hash = ndisc_rdnss_hash_func,
+        .compare = ndisc_rdnss_compare_func
+};
+
+static void ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
+        uint32_t lifetime;
+        const struct in6_addr *a;
+        usec_t time_now;
+        int i, n, r;
+
+        assert(link);
+        assert(rt);
+
+        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_rdnss_get_lifetime(rt, &lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m");
+                return;
+        }
+
+        n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
+        if (n < 0) {
+                log_link_warning_errno(link, n, "Failed to get RDNSS addresses: %m");
+                return;
+        }
+
+        for (i = 0; i < n; i++) {
+                NDiscRDNSS d = {
+                        .address = a[i]
+                }, *x;
+
+                if (lifetime == 0) {
+                        (void) set_remove(link->ndisc_rdnss, &d);
+                        link_dirty(link);
+                        continue;
+                }
+
+                x = set_get(link->ndisc_rdnss, &d);
+                if (x) {
+                        x->valid_until = time_now + lifetime * USEC_PER_SEC;
+                        continue;
+                }
+
+                ndisc_vacuum(link);
+
+                if (set_size(link->ndisc_rdnss) >= NDISC_RDNSS_MAX) {
+                        log_link_warning(link, "Too many RDNSS records per link, ignoring.");
+                        continue;
+                }
+
+                r = set_ensure_allocated(&link->ndisc_rdnss, &ndisc_rdnss_hash_ops);
+                if (r < 0) {
+                        log_oom();
+                        return;
+                }
+
+                x = new0(NDiscRDNSS, 1);
+                if (!x) {
+                        log_oom();
+                        return;
+                }
+
+                x->address = a[i];
+                x->valid_until = time_now + lifetime * USEC_PER_SEC;
+
+                r = set_put(link->ndisc_rdnss, x);
+                if (r < 0) {
+                        free(x);
+                        log_oom();
+                        return;
+                }
+
+                assert(r > 0);
+                link_dirty(link);
+        }
+}
+
+static void ndisc_dnssl_hash_func(const void *p, struct siphash *state) {
+        const NDiscDNSSL *x = p;
+
+        siphash24_compress(NDISC_DNSSL_DOMAIN(x), strlen(NDISC_DNSSL_DOMAIN(x)), state);
+}
+
+static int ndisc_dnssl_compare_func(const void *_a, const void *_b) {
+        const NDiscDNSSL *a = _a, *b = _b;
+
+        return strcmp(NDISC_DNSSL_DOMAIN(a), NDISC_DNSSL_DOMAIN(b));
+}
+
+static const struct hash_ops ndisc_dnssl_hash_ops = {
+        .hash = ndisc_dnssl_hash_func,
+        .compare = ndisc_dnssl_compare_func
+};
+
+static void ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) {
+        _cleanup_strv_free_ char **l = NULL;
+        uint32_t lifetime;
+        usec_t time_now;
+        char **i;
+        int r;
+
+        assert(link);
+        assert(rt);
+
+        r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA timestamp: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_dnssl_get_lifetime(rt, &lifetime);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RDNSS lifetime: %m");
+                return;
+        }
+
+        r = sd_ndisc_router_dnssl_get_domains(rt, &l);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RDNSS addresses: %m");
+                return;
+        }
+
+        STRV_FOREACH(i, l) {
+                struct {
+                        NDiscDNSSL header;
+                        char domain[strlen(*i)];
+                } s;
+                NDiscDNSSL *x;
+
+                zero(s.header);
+                strcpy(s.domain, *i);
+
+                if (lifetime == 0) {
+                        (void) set_remove(link->ndisc_dnssl, &s);
+                        link_dirty(link);
+                        continue;
+                }
+
+                x = set_get(link->ndisc_dnssl, &s);
+                if (x) {
+                        x->valid_until = time_now + lifetime * USEC_PER_SEC;
+                        continue;
+                }
+
+                ndisc_vacuum(link);
+
+                if (set_size(link->ndisc_dnssl) >= NDISC_DNSSL_MAX) {
+                        log_link_warning(link, "Too many DNSSL records per link, ignoring.");
+                        continue;
+                }
+
+                r = set_ensure_allocated(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops);
+                if (r < 0) {
+                        log_oom();
+                        return;
+                }
+
+                x = malloc0(ALIGN(sizeof(NDiscDNSSL)) + strlen(*i) + 1);
+                if (!x) {
+                        log_oom();
+                        return;
+                }
+
+                strcpy(NDISC_DNSSL_DOMAIN(x), *i);
+                x->valid_until = time_now + lifetime * USEC_PER_SEC;
+
+                r = set_put(link->ndisc_dnssl, x);
+                if (r < 0) {
+                        free(x);
+                        log_oom();
+                        return;
+                }
+
+                assert(r > 0);
+                link_dirty(link);
+        }
+}
+
+static void ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
+        int r;
+
+        assert(link);
+        assert(rt);
+
+        r = sd_ndisc_router_option_rewind(rt);
+        for (;;) {
+                uint8_t type;
+
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Failed to iterate through options: %m");
+                        return;
+                }
+                if (r == 0) /* EOF */
+                        break;
+
+                r = sd_ndisc_router_option_get_type(rt, &type);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Failed to get RA option type: %m");
+                        return;
+                }
+
+                switch (type) {
+
+                case SD_NDISC_OPTION_PREFIX_INFORMATION: {
+                        uint8_t flags;
+
+                        r = sd_ndisc_router_prefix_get_flags(rt, &flags);
+                        if (r < 0) {
+                                log_link_warning_errno(link, r, "Failed to get RA prefix flags: %m");
+                                return;
+                        }
+
+                        if (flags & ND_OPT_PI_FLAG_ONLINK)
+                                ndisc_router_process_onlink_prefix(link, rt);
+                        if (flags & ND_OPT_PI_FLAG_AUTO)
+                                ndisc_router_process_autonomous_prefix(link, rt);
+
+                        break;
+                }
+
+                case SD_NDISC_OPTION_ROUTE_INFORMATION:
+                        ndisc_router_process_route(link, rt);
+                        break;
+
+                case SD_NDISC_OPTION_RDNSS:
+                        ndisc_router_process_rdnss(link, rt);
+                        break;
+
+                case SD_NDISC_OPTION_DNSSL:
+                        ndisc_router_process_dnssl(link, rt);
+                        break;
+                }
+
+                r = sd_ndisc_router_option_next(rt);
+        }
+}
+
+static void ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
+        uint64_t flags;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+        assert(rt);
+
+        r = sd_ndisc_router_get_flags(rt, &flags);
+        if (r < 0) {
+                log_link_warning_errno(link, r, "Failed to get RA flags: %m");
+                return;
+        }
+
+        if (flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) {
+                /* (re)start DHCPv6 client in stateful or stateless mode according to RA flags */
+                r = dhcp6_request_address(link, !(flags & ND_RA_FLAG_MANAGED));
+                if (r < 0 && r != -EBUSY)
+                        log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease on NDisc request: %m");
+                else
+                        log_link_debug(link, "Acquiring DHCPv6 lease on NDisc request");
+        }
+
+        ndisc_router_process_default(link, rt);
+        ndisc_router_process_options(link, rt);
+}
+
+static void ndisc_handler(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *rt, void *userdata) {
         Link *link = userdata;
 
         assert(link);
@@ -201,13 +600,16 @@ static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) {
                 return;
 
         switch (event) {
+
+        case SD_NDISC_EVENT_ROUTER:
+                ndisc_router_handler(link, rt);
+                break;
+
         case SD_NDISC_EVENT_TIMEOUT:
                 link->ndisc_configured = true;
                 link_check_ready(link);
 
                 break;
-        case SD_NDISC_EVENT_STOP:
-                break;
         default:
                 log_link_warning(link, "IPv6 Neighbor Discovery unknown event: %d", event);
         }
@@ -216,30 +618,52 @@ static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) {
 int ndisc_configure(Link *link) {
         int r;
 
-        assert_return(link, -EINVAL);
+        assert(link);
+
+        r = sd_ndisc_new(&link->ndisc);
+        if (r < 0)
+                return r;
 
-        r = sd_ndisc_new(&link->ndisc_router_discovery);
+        r = sd_ndisc_attach_event(link->ndisc, NULL, 0);
         if (r < 0)
                 return r;
 
-        r = sd_ndisc_attach_event(link->ndisc_router_discovery, NULL, 0);
+        r = sd_ndisc_set_mac(link->ndisc, &link->mac);
         if (r < 0)
                 return r;
 
-        r = sd_ndisc_set_mac(link->ndisc_router_discovery, &link->mac);
+        r = sd_ndisc_set_ifindex(link->ndisc, link->ifindex);
         if (r < 0)
                 return r;
 
-        r = sd_ndisc_set_ifindex(link->ndisc_router_discovery, link->ifindex);
+        r = sd_ndisc_set_callback(link->ndisc, ndisc_handler, link);
         if (r < 0)
                 return r;
 
-        r = sd_ndisc_set_callback(link->ndisc_router_discovery,
-                                  ndisc_router_handler,
-                                  ndisc_prefix_onlink_handler,
-                                  ndisc_prefix_autonomous_handler,
-                                  ndisc_handler,
-                                  link);
+        return 0;
+}
+
+void ndisc_vacuum(Link *link) {
+        NDiscRDNSS *r;
+        NDiscDNSSL *d;
+        Iterator i;
+        usec_t time_now;
+
+        assert(link);
+
+        /* Removes all RDNSS and DNSSL entries whose validity time has passed */
+
+        time_now = now(clock_boottime_or_monotonic());
+
+        SET_FOREACH(r, link->ndisc_rdnss, i)
+                if (r->valid_until < time_now) {
+                        (void) set_remove(link->ndisc_rdnss, r);
+                        link_dirty(link);
+                }
 
-        return r;
+        SET_FOREACH(d, link->ndisc_dnssl, i)
+                if (d->valid_until < time_now) {
+                        (void) set_remove(link->ndisc_dnssl, d);
+                        link_dirty(link);
+                }
 }
diff --git a/src/network/networkd-ndisc.h b/src/network/networkd-ndisc.h
new file mode 100644
index 0000000000..2002f55107
--- /dev/null
+++ b/src/network/networkd-ndisc.h
@@ -0,0 +1,39 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+  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 "networkd-link.h"
+
+typedef struct NDiscRDNSS {
+        usec_t valid_until;
+        struct in6_addr address;
+} NDiscRDNSS;
+
+typedef struct NDiscDNSSL {
+        usec_t valid_until;
+        /* The domain name follows immediately. */
+} NDiscDNSSL;
+
+static inline char* NDISC_DNSSL_DOMAIN(const NDiscDNSSL *n) {
+        return ((char*) n) + ALIGN(sizeof(NDiscDNSSL));
+}
+
+int ndisc_configure(Link *link);
+void ndisc_vacuum(Link *link);
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index 03e4e3b39f..c722db55c7 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -89,6 +89,8 @@ DHCP.DUIDRawData,                       config_parse_duid_rawdata,
 DHCP.RouteMetric,                       config_parse_unsigned,                          0,                             offsetof(Network, dhcp_route_metric)
 DHCP.UseTimezone,                       config_parse_bool,                              0,                             offsetof(Network, dhcp_use_timezone)
 DHCP.IAID,                              config_parse_iaid,                              0,                             offsetof(Network, iaid)
+IPv6AcceptRouterAdvertisements.UseDNS   config_parse_bool,                              0,                             offsetof(Network, ipv6_accept_ra_use_dns)
+IPv6AcceptRouterAdvertisements.UseDomains config_parse_dhcp_use_domains,                0,                             offsetof(Network, ipv6_accept_ra_use_domains)
 DHCPServer.MaxLeaseTimeSec,             config_parse_sec,                               0,                             offsetof(Network, dhcp_server_max_lease_time_usec)
 DHCPServer.DefaultLeaseTimeSec,         config_parse_sec,                               0,                             offsetof(Network, dhcp_server_default_lease_time_usec)
 DHCPServer.EmitDNS,                     config_parse_bool,                              0,                             offsetof(Network, dhcp_server_emit_dns)
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index dd89b3770c..e961db60a7 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -51,8 +51,8 @@ static int network_load_one(Manager *manager, const char *filename) {
         if (!file) {
                 if (errno == ENOENT)
                         return 0;
-                else
-                        return -errno;
+
+                return -errno;
         }
 
         if (null_or_empty_fd(fileno(file))) {
@@ -134,6 +134,7 @@ static int network_load_one(Manager *manager, const char *filename) {
         network->ipv6_hop_limit = -1;
         network->duid.type = _DUID_TYPE_INVALID;
         network->proxy_arp = -1;
+        network->ipv6_accept_ra_use_dns = true;
 
         r = config_parse(NULL, filename, file,
                          "Match\0"
diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
index 91099161ce..b54616b838 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -154,6 +154,9 @@ struct Network {
         int ipv6_hop_limit;
         int proxy_arp;
 
+        bool ipv6_accept_ra_use_dns;
+        DHCPUseDomains ipv6_accept_ra_use_domains;
+
         union in_addr_union ipv6_token;
         IPv6PrivacyExtensions ipv6_privacy_extensions;
 
diff --git a/src/systemd/sd-lldp.h b/src/systemd/sd-lldp.h
index 5772d5794a..3f35eebea3 100644
--- a/src/systemd/sd-lldp.h
+++ b/src/systemd/sd-lldp.h
@@ -23,6 +23,7 @@
 
 #include <inttypes.h>
 #include <net/ethernet.h>
+#include <sys/types.h>
 
 #include "sd-event.h"
 
@@ -30,9 +31,6 @@
 
 _SD_BEGIN_DECLARATIONS;
 
-typedef struct sd_lldp sd_lldp;
-typedef struct sd_lldp_neighbor sd_lldp_neighbor;
-
 /* IEEE 802.3AB Clause 9: TLV Types */
 enum {
         SD_LLDP_TYPE_END                 = 0,
@@ -111,6 +109,9 @@ enum {
         SD_LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION      = 7,
 };
 
+typedef struct sd_lldp sd_lldp;
+typedef struct sd_lldp_neighbor sd_lldp_neighbor;
+
 typedef enum sd_lldp_event {
         SD_LLDP_EVENT_ADDED     = 'a',
         SD_LLDP_EVENT_REMOVED   = 'r',
@@ -120,7 +121,8 @@ typedef enum sd_lldp_event {
 
 typedef void (*sd_lldp_callback_t)(sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata);
 
-int sd_lldp_new(sd_lldp **ret, int ifindex);
+int sd_lldp_new(sd_lldp **ret);
+sd_lldp* sd_lldp_ref(sd_lldp *lldp);
 sd_lldp* sd_lldp_unref(sd_lldp *lldp);
 
 int sd_lldp_start(sd_lldp *lldp);
@@ -128,8 +130,10 @@ int sd_lldp_stop(sd_lldp *lldp);
 
 int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int64_t priority);
 int sd_lldp_detach_event(sd_lldp *lldp);
+sd_event *sd_lldp_get_event(sd_lldp *lldp);
 
 int sd_lldp_set_callback(sd_lldp *lldp, sd_lldp_callback_t cb, void *userdata);
+int sd_lldp_set_ifindex(sd_lldp *lldp, int ifindex);
 
 /* Controls how much and what to store in the neighbors database */
 int sd_lldp_set_neighbors_max(sd_lldp *lldp, uint64_t n);
@@ -145,6 +149,7 @@ sd_lldp_neighbor *sd_lldp_neighbor_unref(sd_lldp_neighbor *n);
 /* Access to LLDP frame metadata */
 int sd_lldp_neighbor_get_source_address(sd_lldp_neighbor *n, struct ether_addr* address);
 int sd_lldp_neighbor_get_destination_address(sd_lldp_neighbor *n, struct ether_addr* address);
+int sd_lldp_neighbor_get_timestamp(sd_lldp_neighbor *n, clockid_t clock, uint64_t *ret);
 int sd_lldp_neighbor_get_raw(sd_lldp_neighbor *n, const void **ret, size_t *size);
 
 /* High-level, direct, parsed out field access. These fields exist at most once, hence may be queried directly. */
@@ -152,7 +157,7 @@ int sd_lldp_neighbor_get_chassis_id(sd_lldp_neighbor *n, uint8_t *type, const vo
 int sd_lldp_neighbor_get_chassis_id_as_string(sd_lldp_neighbor *n, const char **ret);
 int sd_lldp_neighbor_get_port_id(sd_lldp_neighbor *n, uint8_t *type, const void **ret, size_t *size);
 int sd_lldp_neighbor_get_port_id_as_string(sd_lldp_neighbor *n, const char **ret);
-int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret);
+int sd_lldp_neighbor_get_ttl(sd_lldp_neighbor *n, uint16_t *ret_sec);
 int sd_lldp_neighbor_get_system_name(sd_lldp_neighbor *n, const char **ret);
 int sd_lldp_neighbor_get_system_description(sd_lldp_neighbor *n, const char **ret);
 int sd_lldp_neighbor_get_port_description(sd_lldp_neighbor *n, const char **ret);
diff --git a/src/systemd/sd-ndisc.h b/src/systemd/sd-ndisc.h
index 2b774233b8..9f7d4ef71a 100644
--- a/src/systemd/sd-ndisc.h
+++ b/src/systemd/sd-ndisc.h
@@ -22,6 +22,8 @@
 
 #include <inttypes.h>
 #include <net/ethernet.h>
+#include <netinet/in.h>
+#include <sys/types.h>
 
 #include "sd-event.h"
 
@@ -29,55 +31,99 @@
 
 _SD_BEGIN_DECLARATIONS;
 
+/* Neightbor Discovery Options, RFC 4861, Section 4.6 and
+ * https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml#icmpv6-parameters-5 */
 enum {
-        SD_NDISC_EVENT_STOP     = 0,
-        SD_NDISC_EVENT_TIMEOUT  = 1,
+        SD_NDISC_OPTION_SOURCE_LL_ADDRESS  = 1,
+        SD_NDISC_OPTION_TARGET_LL_ADDRESS  = 2,
+        SD_NDISC_OPTION_PREFIX_INFORMATION = 3,
+        SD_NDISC_OPTION_MTU                = 5,
+        SD_NDISC_OPTION_ROUTE_INFORMATION  = 24,
+        SD_NDISC_OPTION_RDNSS              = 25,
+        SD_NDISC_OPTION_FLAGS_EXTENSION    = 26,
+        SD_NDISC_OPTION_DNSSL              = 31,
+        SD_NDISC_OPTION_CAPTIVE_PORTAL     = 37,
+};
+
+/* Route preference, RFC 4191, Section 2.1 */
+enum {
+        SD_NDISC_PREFERENCE_LOW    = 3U,
+        SD_NDISC_PREFERENCE_MEDIUM = 0U,
+        SD_NDISC_PREFERENCE_HIGH   = 1U,
 };
 
 typedef struct sd_ndisc sd_ndisc;
+typedef struct sd_ndisc_router sd_ndisc_router;
 
-typedef void(*sd_ndisc_router_callback_t)(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata);
-typedef void(*sd_ndisc_prefix_onlink_callback_t)(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen,
-                                                 unsigned lifetime, void *userdata);
-typedef void(*sd_ndisc_prefix_autonomous_callback_t)(sd_ndisc *nd, const struct in6_addr *prefix, unsigned prefixlen,
-                                                     unsigned lifetime_prefered, unsigned lifetime_valid, void *userdata);
-typedef void(*sd_ndisc_callback_t)(sd_ndisc *nd, int event, void *userdata);
-
-int sd_ndisc_set_callback(sd_ndisc *nd,
-                          sd_ndisc_router_callback_t rcb,
-                          sd_ndisc_prefix_onlink_callback_t plcb,
-                          sd_ndisc_prefix_autonomous_callback_t pacb,
-                          sd_ndisc_callback_t cb,
-                          void *userdata);
-int sd_ndisc_set_ifindex(sd_ndisc *nd, int interface_index);
-int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr);
+typedef enum sd_ndisc_event {
+        SD_NDISC_EVENT_TIMEOUT = 't',
+        SD_NDISC_EVENT_ROUTER  = 'r',
+} sd_ndisc_event;
 
-int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority);
-int sd_ndisc_detach_event(sd_ndisc *nd);
-sd_event *sd_ndisc_get_event(sd_ndisc *nd);
+typedef void (*sd_ndisc_callback_t)(sd_ndisc *nd, sd_ndisc_event event, sd_ndisc_router *rt, void *userdata);
 
+int sd_ndisc_new(sd_ndisc **ret);
 sd_ndisc *sd_ndisc_ref(sd_ndisc *nd);
 sd_ndisc *sd_ndisc_unref(sd_ndisc *nd);
-int sd_ndisc_new(sd_ndisc **ret);
-
-int sd_ndisc_get_mtu(sd_ndisc *nd, uint32_t *mtu);
 
+int sd_ndisc_start(sd_ndisc *nd);
 int sd_ndisc_stop(sd_ndisc *nd);
-int sd_ndisc_router_discovery_start(sd_ndisc *nd);
 
-#define SD_NDISC_ADDRESS_FORMAT_STR "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
+int sd_ndisc_attach_event(sd_ndisc *nd, sd_event *event, int64_t priority);
+int sd_ndisc_detach_event(sd_ndisc *nd);
+sd_event *sd_ndisc_get_event(sd_ndisc *nd);
+
+int sd_ndisc_set_callback(sd_ndisc *nd, sd_ndisc_callback_t cb, void *userdata);
+int sd_ndisc_set_ifindex(sd_ndisc *nd, int interface_index);
+int sd_ndisc_set_mac(sd_ndisc *nd, const struct ether_addr *mac_addr);
 
-#define SD_NDISC_ADDRESS_FORMAT_VAL(address) \
-        be16toh((address).s6_addr16[0]),        \
-        be16toh((address).s6_addr16[1]),        \
-        be16toh((address).s6_addr16[2]),        \
-        be16toh((address).s6_addr16[3]),        \
-        be16toh((address).s6_addr16[4]),        \
-        be16toh((address).s6_addr16[5]),        \
-        be16toh((address).s6_addr16[6]),        \
-        be16toh((address).s6_addr16[7])
+int sd_ndisc_get_mtu(sd_ndisc *nd, uint32_t *ret);
+int sd_ndisc_get_hop_limit(sd_ndisc *nd, uint8_t *ret);
+
+int sd_ndisc_router_from_raw(sd_ndisc_router **ret, const void *raw, size_t raw_size);
+sd_ndisc_router *sd_ndisc_router_ref(sd_ndisc_router *rt);
+sd_ndisc_router *sd_ndisc_router_unref(sd_ndisc_router *rt);
+
+int sd_ndisc_router_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr);
+int sd_ndisc_router_get_timestamp(sd_ndisc_router *rt, clockid_t clock, uint64_t *ret);
+int sd_ndisc_router_get_raw(sd_ndisc_router *rt, const void **ret, size_t *size);
+
+int sd_ndisc_router_get_hop_limit(sd_ndisc_router *rt, uint8_t *ret);
+int sd_ndisc_router_get_flags(sd_ndisc_router *rt, uint64_t *ret_flags);
+int sd_ndisc_router_get_preference(sd_ndisc_router *rt, unsigned *ret);
+int sd_ndisc_router_get_lifetime(sd_ndisc_router *rt, uint16_t *ret_lifetime);
+int sd_ndisc_router_get_mtu(sd_ndisc_router *rt, uint32_t *ret);
+
+/* Generic option access */
+int sd_ndisc_router_option_rewind(sd_ndisc_router *rt);
+int sd_ndisc_router_option_next(sd_ndisc_router *rt);
+int sd_ndisc_router_option_get_type(sd_ndisc_router *rt, uint8_t *ret);
+int sd_ndisc_router_option_is_type(sd_ndisc_router *rt, uint8_t type);
+int sd_ndisc_router_option_get_raw(sd_ndisc_router *rt, const void **ret, size_t *size);
+
+/* Specific option access: SD_NDISC_OPTION_PREFIX_INFORMATION */
+int sd_ndisc_router_prefix_get_valid_lifetime(sd_ndisc_router *rt, uint32_t *ret);
+int sd_ndisc_router_prefix_get_preferred_lifetime(sd_ndisc_router *rt, uint32_t *ret);
+int sd_ndisc_router_prefix_get_flags(sd_ndisc_router *rt, uint8_t *ret);
+int sd_ndisc_router_prefix_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr);
+int sd_ndisc_router_prefix_get_prefixlen(sd_ndisc_router *rt, unsigned *prefixlen);
+
+/* Specific option access: SD_NDISC_OPTION_ROUTE_INFORMATION */
+int sd_ndisc_router_route_get_lifetime(sd_ndisc_router *rt, uint32_t *ret);
+int sd_ndisc_router_route_get_address(sd_ndisc_router *rt, struct in6_addr *ret_addr);
+int sd_ndisc_router_route_get_prefixlen(sd_ndisc_router *rt, unsigned *prefixlen);
+int sd_ndisc_router_route_get_preference(sd_ndisc_router *rt, unsigned *ret);
+
+/* Specific option access: SD_NDISC_OPTION_RDNSS */
+int sd_ndisc_router_rdnss_get_addresses(sd_ndisc_router *rt, const struct in6_addr **ret);
+int sd_ndisc_router_rdnss_get_lifetime(sd_ndisc_router *rt, uint32_t *ret);
+
+/* Specific option access: SD_NDISC_OPTION_DNSSL */
+int sd_ndisc_router_dnssl_get_domains(sd_ndisc_router *rt, char ***ret);
+int sd_ndisc_router_dnssl_get_lifetime(sd_ndisc_router *rt, uint32_t *ret);
 
 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_ndisc, sd_ndisc_unref);
+_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_ndisc_router, sd_ndisc_router_unref);
 
 _SD_END_DECLARATIONS;
 
diff --git a/src/test/test-unaligned.c b/src/test/test-unaligned.c
index b18b3fca0e..4f64398943 100644
--- a/src/test/test-unaligned.c
+++ b/src/test/test-unaligned.c
@@ -159,7 +159,31 @@ static void test_le(void) {
         assert_se(memcmp(&scratch[7], &data[7], sizeof(uint64_t)) == 0);
 }
 
+static void test_ne(void) {
+        uint16_t x = 4711;
+        uint32_t y = 123456;
+        uint64_t z = 9876543210;
+
+        /* Note that we don't bother actually testing alignment issues in this function, after all the _ne() functions
+         * are just aliases for the _le() or _be() implementations, which we test extensively above. Hence, in this
+         * function, just ensure that they map to the right version on the local architecture. */
+
+        assert_se(unaligned_read_ne16(&x) == 4711);
+        assert_se(unaligned_read_ne32(&y) == 123456);
+        assert_se(unaligned_read_ne64(&z) == 9876543210);
+
+        unaligned_write_ne16(&x, 1);
+        unaligned_write_ne32(&y, 2);
+        unaligned_write_ne64(&z, 3);
+
+        assert_se(x == 1);
+        assert_se(y == 2);
+        assert_se(z == 3);
+}
+
 int main(int argc, const char *argv[]) {
         test_be();
         test_le();
+        test_ne();
+        return 0;
 }