./move.sh

1 files changed, 0 insertions, 1316 deletions

diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
deleted file mode 100644
index 05972e01c9..0000000000
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ /dev/null
@@ -1,1316 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014-2015 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 <errno.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <linux/if_infiniband.h>
-
-#include "sd-dhcp6-client.h"
-
-#include "alloc-util.h"
-#include "dhcp-identifier.h"
-#include "dhcp6-internal.h"
-#include "dhcp6-lease-internal.h"
-#include "dhcp6-protocol.h"
-#include "fd-util.h"
-#include "in-addr-util.h"
-#include "network-internal.h"
-#include "random-util.h"
-#include "socket-util.h"
-#include "string-table.h"
-#include "util.h"
-
-#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
-
-struct sd_dhcp6_client {
-        unsigned n_ref;
-
-        enum DHCP6State state;
-        sd_event *event;
-        int event_priority;
-        int index;
-        struct in6_addr local_address;
-        uint8_t mac_addr[MAX_MAC_ADDR_LEN];
-        size_t mac_addr_len;
-        uint16_t arp_type;
-        DHCP6IA ia_na;
-        be32_t transaction_id;
-        usec_t transaction_start;
-        struct sd_dhcp6_lease *lease;
-        int fd;
-        bool information_request;
-        be16_t *req_opts;
-        size_t req_opts_allocated;
-        size_t req_opts_len;
-        sd_event_source *receive_message;
-        usec_t retransmit_time;
-        uint8_t retransmit_count;
-        sd_event_source *timeout_resend;
-        sd_event_source *timeout_resend_expire;
-        sd_dhcp6_client_callback_t cb;
-        void *userdata;
-        struct duid duid;
-        size_t duid_len;
-};
-
-static const uint16_t default_req_opts[] = {
-        SD_DHCP6_OPTION_DNS_SERVERS,
-        SD_DHCP6_OPTION_DOMAIN_LIST,
-        SD_DHCP6_OPTION_NTP_SERVER,
-        SD_DHCP6_OPTION_SNTP_SERVERS,
-};
-
-const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = {
-        [DHCP6_SOLICIT] = "SOLICIT",
-        [DHCP6_ADVERTISE] = "ADVERTISE",
-        [DHCP6_REQUEST] = "REQUEST",
-        [DHCP6_CONFIRM] = "CONFIRM",
-        [DHCP6_RENEW] = "RENEW",
-        [DHCP6_REBIND] = "REBIND",
-        [DHCP6_REPLY] = "REPLY",
-        [DHCP6_RELEASE] = "RELEASE",
-        [DHCP6_DECLINE] = "DECLINE",
-        [DHCP6_RECONFIGURE] = "RECONFIGURE",
-        [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST",
-        [DHCP6_RELAY_FORW] = "RELAY-FORW",
-        [DHCP6_RELAY_REPL] = "RELAY-REPL",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int);
-
-const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = {
-        [DHCP6_STATUS_SUCCESS] = "Success",
-        [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure",
-        [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available",
-        [DHCP6_STATUS_NO_BINDING] = "Binding unavailable",
-        [DHCP6_STATUS_NOT_ON_LINK] = "Not on link",
-        [DHCP6_STATUS_USE_MULTICAST] = "Use multicast",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int);
-
-#define DHCP6_CLIENT_DONT_DESTROY(client) \
-        _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client)
-
-static int client_start(sd_dhcp6_client *client, enum DHCP6State state);
-
-int sd_dhcp6_client_set_callback(
-                sd_dhcp6_client *client,
-                sd_dhcp6_client_callback_t cb,
-                void *userdata) {
-        assert_return(client, -EINVAL);
-
-        client->cb = cb;
-        client->userdata = userdata;
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index) {
-        assert_return(client, -EINVAL);
-        assert_return(interface_index >= -1, -EINVAL);
-
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        client->index = interface_index;
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_local_address(
-                sd_dhcp6_client *client,
-                const struct in6_addr *local_address) {
-
-        assert_return(client, -EINVAL);
-        assert_return(local_address, -EINVAL);
-        assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL);
-
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        client->local_address = *local_address;
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_mac(
-                sd_dhcp6_client *client,
-                const uint8_t *addr, size_t addr_len,
-                uint16_t arp_type) {
-
-        assert_return(client, -EINVAL);
-        assert_return(addr, -EINVAL);
-        assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL);
-        assert_return(arp_type > 0, -EINVAL);
-
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        if (arp_type == ARPHRD_ETHER)
-                assert_return(addr_len == ETH_ALEN, -EINVAL);
-        else if (arp_type == ARPHRD_INFINIBAND)
-                assert_return(addr_len == INFINIBAND_ALEN, -EINVAL);
-        else
-                return -EINVAL;
-
-        if (client->mac_addr_len == addr_len &&
-            memcmp(&client->mac_addr, addr, addr_len) == 0)
-                return 0;
-
-        memcpy(&client->mac_addr, addr, addr_len);
-        client->mac_addr_len = addr_len;
-        client->arp_type = arp_type;
-
-        return 0;
-}
-
-static int client_ensure_duid(sd_dhcp6_client *client) {
-        if (client->duid_len != 0)
-                return 0;
-
-        return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len);
-}
-
-/**
- * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid
- * without further modification. Otherwise, if duid_type is supported, DUID
- * is set based on that type. Otherwise, an error is returned.
- */
-int sd_dhcp6_client_set_duid(
-                sd_dhcp6_client *client,
-                uint16_t duid_type,
-                const void *duid,
-                size_t duid_len) {
-
-        int r;
-        assert_return(client, -EINVAL);
-        assert_return(duid_len == 0 || duid != NULL, -EINVAL);
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        if (duid != NULL) {
-                r = dhcp_validate_duid_len(duid_type, duid_len);
-                if (r < 0)
-                        return r;
-        }
-
-        if (duid != NULL) {
-                client->duid.type = htobe16(duid_type);
-                memcpy(&client->duid.raw.data, duid, duid_len);
-                client->duid_len = sizeof(client->duid.type) + duid_len;
-        } else if (duid_type == DUID_TYPE_EN) {
-                r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len);
-                if (r < 0)
-                        return r;
-        } else
-                return -EOPNOTSUPP;
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) {
-        assert_return(client, -EINVAL);
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        client->ia_na.id = htobe32(iaid);
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) {
-        assert_return(client, -EINVAL);
-        assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
-
-        client->information_request = enabled;
-
-        return 0;
-}
-
-int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) {
-        assert_return(client, -EINVAL);
-        assert_return(enabled, -EINVAL);
-
-        *enabled = client->information_request;
-
-        return 0;
-}
-
-int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) {
-        size_t t;
-
-        assert_return(client, -EINVAL);
-        assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY);
-
-        switch(option) {
-        case SD_DHCP6_OPTION_DNS_SERVERS:
-        case SD_DHCP6_OPTION_DOMAIN_LIST:
-        case SD_DHCP6_OPTION_SNTP_SERVERS:
-        case SD_DHCP6_OPTION_NTP_SERVER:
-                break;
-
-        default:
-                return -EINVAL;
-        }
-
-        for (t = 0; t < client->req_opts_len; t++)
-                if (client->req_opts[t] == htobe16(option))
-                        return -EEXIST;
-
-        if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated,
-                            client->req_opts_len + 1))
-                return -ENOMEM;
-
-        client->req_opts[client->req_opts_len++] = htobe16(option);
-
-        return 0;
-}
-
-int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) {
-        assert_return(client, -EINVAL);
-
-        if (!client->lease)
-                return -ENOMSG;
-
-        if (ret)
-                *ret = client->lease;
-
-        return 0;
-}
-
-static void client_notify(sd_dhcp6_client *client, int event) {
-        if (client->cb)
-                client->cb(client, event, client->userdata);
-}
-
-static void client_set_lease(sd_dhcp6_client *client, sd_dhcp6_lease *lease) {
-        if (client->lease) {
-                dhcp6_lease_clear_timers(&client->lease->ia);
-                sd_dhcp6_lease_unref(client->lease);
-        }
-        client->lease = lease;
-}
-
-static int client_reset(sd_dhcp6_client *client) {
-        assert_return(client, -EINVAL);
-
-        client_set_lease(client, NULL);
-
-        client->receive_message =
-                sd_event_source_unref(client->receive_message);
-
-        client->fd = safe_close(client->fd);
-
-        client->transaction_id = 0;
-        client->transaction_start = 0;
-
-        client->ia_na.timeout_t1 =
-                sd_event_source_unref(client->ia_na.timeout_t1);
-        client->ia_na.timeout_t2 =
-                sd_event_source_unref(client->ia_na.timeout_t2);
-
-        client->retransmit_time = 0;
-        client->retransmit_count = 0;
-        client->timeout_resend = sd_event_source_unref(client->timeout_resend);
-        client->timeout_resend_expire =
-                sd_event_source_unref(client->timeout_resend_expire);
-
-        client->state = DHCP6_STATE_STOPPED;
-
-        return 0;
-}
-
-static void client_stop(sd_dhcp6_client *client, int error) {
-        DHCP6_CLIENT_DONT_DESTROY(client);
-
-        assert(client);
-
-        client_notify(client, error);
-
-        client_reset(client);
-}
-
-static int client_send_message(sd_dhcp6_client *client, usec_t time_now) {
-        _cleanup_free_ DHCP6Message *message = NULL;
-        struct in6_addr all_servers =
-                IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
-        size_t len, optlen = 512;
-        uint8_t *opt;
-        int r;
-        usec_t elapsed_usec;
-        be16_t elapsed_time;
-
-        len = sizeof(DHCP6Message) + optlen;
-
-        message = malloc0(len);
-        if (!message)
-                return -ENOMEM;
-
-        opt = (uint8_t *)(message + 1);
-
-        message->transaction_id = client->transaction_id;
-
-        switch(client->state) {
-        case DHCP6_STATE_INFORMATION_REQUEST:
-                message->type = DHCP6_INFORMATION_REQUEST;
-
-                break;
-
-        case DHCP6_STATE_SOLICITATION:
-                message->type = DHCP6_SOLICIT;
-
-                r = dhcp6_option_append(&opt, &optlen,
-                                        SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL);
-                if (r < 0)
-                        return r;
-
-                r = dhcp6_option_append_ia(&opt, &optlen, &client->ia_na);
-                if (r < 0)
-                        return r;
-
-                break;
-
-        case DHCP6_STATE_REQUEST:
-        case DHCP6_STATE_RENEW:
-
-                if (client->state == DHCP6_STATE_REQUEST)
-                        message->type = DHCP6_REQUEST;
-                else
-                        message->type = DHCP6_RENEW;
-
-                r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID,
-                                        client->lease->serverid_len,
-                                        client->lease->serverid);
-                if (r < 0)
-                        return r;
-
-                r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia);
-                if (r < 0)
-                        return r;
-
-                break;
-
-        case DHCP6_STATE_REBIND:
-                message->type = DHCP6_REBIND;
-
-                r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia);
-                if (r < 0)
-                        return r;
-
-                break;
-
-        case DHCP6_STATE_STOPPED:
-        case DHCP6_STATE_BOUND:
-                return -EINVAL;
-        }
-
-        r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO,
-                                client->req_opts_len * sizeof(be16_t),
-                                client->req_opts);
-        if (r < 0)
-                return r;
-
-        assert (client->duid_len);
-        r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID,
-                                client->duid_len, &client->duid);
-        if (r < 0)
-                return r;
-
-        elapsed_usec = time_now - client->transaction_start;
-        if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10)
-                elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10);
-        else
-                elapsed_time = 0xffff;
-
-        r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME,
-                                sizeof(elapsed_time), &elapsed_time);
-        if (r < 0)
-                return r;
-
-        r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message,
-                                          len - optlen);
-        if (r < 0)
-                return r;
-
-        log_dhcp6_client(client, "Sent %s",
-                         dhcp6_message_type_to_string(message->type));
-
-        return 0;
-}
-
-static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) {
-        sd_dhcp6_client *client = userdata;
-
-        assert_return(s, -EINVAL);
-        assert_return(client, -EINVAL);
-        assert_return(client->lease, -EINVAL);
-
-        client->lease->ia.timeout_t2 =
-                sd_event_source_unref(client->lease->ia.timeout_t2);
-
-        log_dhcp6_client(client, "Timeout T2");
-
-        client_start(client, DHCP6_STATE_REBIND);
-
-        return 0;
-}
-
-static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) {
-        sd_dhcp6_client *client = userdata;
-
-        assert_return(s, -EINVAL);
-        assert_return(client, -EINVAL);
-        assert_return(client->lease, -EINVAL);
-
-        client->lease->ia.timeout_t1 =
-                sd_event_source_unref(client->lease->ia.timeout_t1);
-
-        log_dhcp6_client(client, "Timeout T1");
-
-        client_start(client, DHCP6_STATE_RENEW);
-
-        return 0;
-}
-
-static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) {
-        sd_dhcp6_client *client = userdata;
-        DHCP6_CLIENT_DONT_DESTROY(client);
-        enum DHCP6State state;
-
-        assert(s);
-        assert(client);
-        assert(client->event);
-
-        state = client->state;
-
-        client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE);
-
-        /* RFC 3315, section 18.1.4., says that "...the client may choose to
-           use a Solicit message to locate a new DHCP server..." */
-        if (state == DHCP6_STATE_REBIND)
-                client_start(client, DHCP6_STATE_SOLICITATION);
-
-        return 0;
-}
-
-static usec_t client_timeout_compute_random(usec_t val) {
-        return val - val / 10 +
-                (random_u32() % (2 * USEC_PER_SEC)) * val / 10 / USEC_PER_SEC;
-}
-
-static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) {
-        int r = 0;
-        sd_dhcp6_client *client = userdata;
-        usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0;
-        usec_t max_retransmit_duration = 0;
-        uint8_t max_retransmit_count = 0;
-        char time_string[FORMAT_TIMESPAN_MAX];
-        uint32_t expire = 0;
-
-        assert(s);
-        assert(client);
-        assert(client->event);
-
-        client->timeout_resend = sd_event_source_unref(client->timeout_resend);
-
-        switch (client->state) {
-        case DHCP6_STATE_INFORMATION_REQUEST:
-                init_retransmit_time = DHCP6_INF_TIMEOUT;
-                max_retransmit_time = DHCP6_INF_MAX_RT;
-
-                break;
-
-        case DHCP6_STATE_SOLICITATION:
-
-                if (client->retransmit_count && client->lease) {
-                        client_start(client, DHCP6_STATE_REQUEST);
-                        return 0;
-                }
-
-                init_retransmit_time = DHCP6_SOL_TIMEOUT;
-                max_retransmit_time = DHCP6_SOL_MAX_RT;
-
-                break;
-
-        case DHCP6_STATE_REQUEST:
-                init_retransmit_time = DHCP6_REQ_TIMEOUT;
-                max_retransmit_time = DHCP6_REQ_MAX_RT;
-                max_retransmit_count = DHCP6_REQ_MAX_RC;
-
-                break;
-
-        case DHCP6_STATE_RENEW:
-                init_retransmit_time = DHCP6_REN_TIMEOUT;
-                max_retransmit_time = DHCP6_REN_MAX_RT;
-
-                /* RFC 3315, section 18.1.3. says max retransmit duration will
-                   be the remaining time until T2. Instead of setting MRD,
-                   wait for T2 to trigger with the same end result */
-
-                break;
-
-        case DHCP6_STATE_REBIND:
-                init_retransmit_time = DHCP6_REB_TIMEOUT;
-                max_retransmit_time = DHCP6_REB_MAX_RT;
-
-                if (!client->timeout_resend_expire) {
-                        r = dhcp6_lease_ia_rebind_expire(&client->lease->ia,
-                                                         &expire);
-                        if (r < 0) {
-                                client_stop(client, r);
-                                return 0;
-                        }
-                        max_retransmit_duration = expire * USEC_PER_SEC;
-                }
-
-                break;
-
-        case DHCP6_STATE_STOPPED:
-        case DHCP6_STATE_BOUND:
-                return 0;
-        }
-
-        if (max_retransmit_count &&
-            client->retransmit_count >= max_retransmit_count) {
-                client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX);
-                return 0;
-        }
-
-        r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
-        if (r < 0)
-                goto error;
-
-        r = client_send_message(client, time_now);
-        if (r >= 0)
-                client->retransmit_count++;
-
-        if (!client->retransmit_time) {
-                client->retransmit_time =
-                        client_timeout_compute_random(init_retransmit_time);
-
-                if (client->state == DHCP6_STATE_SOLICITATION)
-                        client->retransmit_time += init_retransmit_time / 10;
-
-        } else {
-                if (max_retransmit_time &&
-                    client->retransmit_time > max_retransmit_time / 2)
-                        client->retransmit_time = client_timeout_compute_random(max_retransmit_time);
-                else
-                        client->retransmit_time += client_timeout_compute_random(client->retransmit_time);
-        }
-
-        log_dhcp6_client(client, "Next retransmission in %s",
-                         format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC));
-
-        r = sd_event_add_time(client->event, &client->timeout_resend,
-                              clock_boottime_or_monotonic(),
-                              time_now + client->retransmit_time,
-                              10 * USEC_PER_MSEC, client_timeout_resend,
-                              client);
-        if (r < 0)
-                goto error;
-
-        r = sd_event_source_set_priority(client->timeout_resend,
-                                         client->event_priority);
-        if (r < 0)
-                goto error;
-
-        r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timer");
-        if (r < 0)
-                goto error;
-
-        if (max_retransmit_duration && !client->timeout_resend_expire) {
-
-                log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs",
-                                 max_retransmit_duration / USEC_PER_SEC);
-
-                r = sd_event_add_time(client->event,
-                                      &client->timeout_resend_expire,
-                                      clock_boottime_or_monotonic(),
-                                      time_now + max_retransmit_duration,
-                                      USEC_PER_SEC,
-                                      client_timeout_resend_expire, client);
-                if (r < 0)
-                        goto error;
-
-                r = sd_event_source_set_priority(client->timeout_resend_expire,
-                                                 client->event_priority);
-                if (r < 0)
-                        goto error;
-
-                r = sd_event_source_set_description(client->timeout_resend_expire, "dhcp6-resend-expire-timer");
-                if (r < 0)
-                        goto error;
-        }
-
-error:
-        if (r < 0)
-                client_stop(client, r);
-
-        return 0;
-}
-
-static int client_ensure_iaid(sd_dhcp6_client *client) {
-        int r;
-
-        assert(client);
-
-        if (client->ia_na.id)
-                return 0;
-
-        r = dhcp_identifier_set_iaid(client->index, client->mac_addr, client->mac_addr_len, &client->ia_na.id);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-static int client_parse_message(
-                sd_dhcp6_client *client,
-                DHCP6Message *message,
-                size_t len,
-                sd_dhcp6_lease *lease) {
-        int r;
-        uint8_t *optval, *option, *id = NULL;
-        uint16_t optcode, status;
-        size_t optlen, id_len;
-        bool clientid = false;
-        be32_t iaid_lease;
-
-        option = (uint8_t *)message + sizeof(DHCP6Message);
-        len -= sizeof(DHCP6Message);
-
-        while ((r = dhcp6_option_parse(&option, &len, &optcode, &optlen,
-                                       &optval)) >= 0) {
-                switch (optcode) {
-                case SD_DHCP6_OPTION_CLIENTID:
-                        if (clientid) {
-                                log_dhcp6_client(client, "%s contains multiple clientids",
-                                                 dhcp6_message_type_to_string(message->type));
-                                return -EINVAL;
-                        }
-
-                        if (optlen != client->duid_len ||
-                            memcmp(&client->duid, optval, optlen) != 0) {
-                                log_dhcp6_client(client, "%s DUID does not match",
-                                                 dhcp6_message_type_to_string(message->type));
-
-                                return -EINVAL;
-                        }
-                        clientid = true;
-
-                        break;
-
-                case SD_DHCP6_OPTION_SERVERID:
-                        r = dhcp6_lease_get_serverid(lease, &id, &id_len);
-                        if (r >= 0 && id) {
-                                log_dhcp6_client(client, "%s contains multiple serverids",
-                                                 dhcp6_message_type_to_string(message->type));
-                                return -EINVAL;
-                        }
-
-                        r = dhcp6_lease_set_serverid(lease, optval, optlen);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_PREFERENCE:
-                        if (optlen != 1)
-                                return -EINVAL;
-
-                        r = dhcp6_lease_set_preference(lease, *optval);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_STATUS_CODE:
-                        if (optlen < 2)
-                                return -EINVAL;
-
-                        status = optval[0] << 8 | optval[1];
-                        if (status) {
-                                log_dhcp6_client(client, "%s Status %s",
-                                                 dhcp6_message_type_to_string(message->type),
-                                                 dhcp6_message_status_to_string(status));
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case SD_DHCP6_OPTION_IA_NA:
-                        if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
-                                log_dhcp6_client(client, "Information request ignoring IA NA option");
-
-                                break;
-                        }
-
-                        r = dhcp6_option_parse_ia(&optval, &optlen, optcode,
-                                                  &lease->ia);
-                        if (r < 0 && r != -ENOMSG)
-                                return r;
-
-                        r = dhcp6_lease_get_iaid(lease, &iaid_lease);
-                        if (r < 0)
-                                return r;
-
-                        if (client->ia_na.id != iaid_lease) {
-                                log_dhcp6_client(client, "%s has wrong IAID",
-                                                 dhcp6_message_type_to_string(message->type));
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case SD_DHCP6_OPTION_RAPID_COMMIT:
-                        r = dhcp6_lease_set_rapid_commit(lease);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_DNS_SERVERS:
-                        r = dhcp6_lease_set_dns(lease, optval, optlen);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_DOMAIN_LIST:
-                        r = dhcp6_lease_set_domains(lease, optval, optlen);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_NTP_SERVER:
-                        r = dhcp6_lease_set_ntp(lease, optval, optlen);
-                        if (r < 0)
-                                return r;
-
-                        break;
-
-                case SD_DHCP6_OPTION_SNTP_SERVERS:
-                        r = dhcp6_lease_set_sntp(lease, optval, optlen);
-                        if (r < 0)
-                                return r;
-
-                        break;
-                }
-
-        }
-
-        if (r == -ENOMSG)
-                r = 0;
-
-        if (r < 0 || !clientid) {
-                log_dhcp6_client(client, "%s has incomplete options",
-                                 dhcp6_message_type_to_string(message->type));
-                return -EINVAL;
-        }
-
-        if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
-                r = dhcp6_lease_get_serverid(lease, &id, &id_len);
-                if (r < 0)
-                        log_dhcp6_client(client, "%s has no server id",
-                                         dhcp6_message_type_to_string(message->type));
-        }
-
-        return r;
-}
-
-static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) {
-        int r;
-        _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
-        bool rapid_commit;
-
-        if (reply->type != DHCP6_REPLY)
-                return 0;
-
-        r = dhcp6_lease_new(&lease);
-        if (r < 0)
-                return -ENOMEM;
-
-        r = client_parse_message(client, reply, len, lease);
-        if (r < 0)
-                return r;
-
-        if (client->state == DHCP6_STATE_SOLICITATION) {
-                r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit);
-                if (r < 0)
-                        return r;
-
-                if (!rapid_commit)
-                        return 0;
-        }
-
-        client_set_lease(client, lease);
-        lease = NULL;
-
-        return DHCP6_STATE_BOUND;
-}
-
-static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) {
-        int r;
-        _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
-        uint8_t pref_advertise = 0, pref_lease = 0;
-
-        if (advertise->type != DHCP6_ADVERTISE)
-                return 0;
-
-        r = dhcp6_lease_new(&lease);
-        if (r < 0)
-                return r;
-
-        r = client_parse_message(client, advertise, len, lease);
-        if (r < 0)
-                return r;
-
-        r = dhcp6_lease_get_preference(lease, &pref_advertise);
-        if (r < 0)
-                return r;
-
-        r = dhcp6_lease_get_preference(client->lease, &pref_lease);
-
-        if (r < 0 || pref_advertise > pref_lease) {
-                client_set_lease(client, lease);
-                lease = NULL;
-                r = 0;
-        }
-
-        if (pref_advertise == 255 || client->retransmit_count > 1)
-                r = DHCP6_STATE_REQUEST;
-
-        return r;
-}
-
-static int client_receive_message(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        sd_dhcp6_client *client = userdata;
-        DHCP6_CLIENT_DONT_DESTROY(client);
-        _cleanup_free_ DHCP6Message *message = NULL;
-        ssize_t buflen, len;
-        int r = 0;
-
-        assert(s);
-        assert(client);
-        assert(client->event);
-
-        buflen = next_datagram_size_fd(fd);
-        if (buflen < 0)
-                return buflen;
-
-        message = malloc(buflen);
-        if (!message)
-                return -ENOMEM;
-
-        len = recv(fd, message, buflen, 0);
-        if (len < 0) {
-                if (errno == EAGAIN || errno == EINTR)
-                        return 0;
-
-                return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m");
-
-        } else if ((size_t)len < sizeof(DHCP6Message))
-                return 0;
-
-        switch(message->type) {
-        case DHCP6_SOLICIT:
-        case DHCP6_REQUEST:
-        case DHCP6_CONFIRM:
-        case DHCP6_RENEW:
-        case DHCP6_REBIND:
-        case DHCP6_RELEASE:
-        case DHCP6_DECLINE:
-        case DHCP6_INFORMATION_REQUEST:
-        case DHCP6_RELAY_FORW:
-        case DHCP6_RELAY_REPL:
-                return 0;
-
-        case DHCP6_ADVERTISE:
-        case DHCP6_REPLY:
-        case DHCP6_RECONFIGURE:
-                break;
-
-        default:
-                log_dhcp6_client(client, "Unknown message type %d", message->type);
-                return 0;
-        }
-
-        if (client->transaction_id != (message->transaction_id &
-                                       htobe32(0x00ffffff)))
-                return 0;
-
-        switch (client->state) {
-        case DHCP6_STATE_INFORMATION_REQUEST:
-                r = client_receive_reply(client, message, len);
-                if (r < 0)
-                        return 0;
-
-                client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST);
-
-                client_start(client, DHCP6_STATE_STOPPED);
-
-                break;
-
-        case DHCP6_STATE_SOLICITATION:
-                r = client_receive_advertise(client, message, len);
-
-                if (r == DHCP6_STATE_REQUEST) {
-                        client_start(client, r);
-
-                        break;
-                }
-
-                /* fall through for Soliciation Rapid Commit option check */
-        case DHCP6_STATE_REQUEST:
-        case DHCP6_STATE_RENEW:
-        case DHCP6_STATE_REBIND:
-
-                r = client_receive_reply(client, message, len);
-                if (r < 0)
-                        return 0;
-
-                if (r == DHCP6_STATE_BOUND) {
-
-                        r = client_start(client, DHCP6_STATE_BOUND);
-                        if (r < 0) {
-                                client_stop(client, r);
-                                return 0;
-                        }
-
-                        client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE);
-                }
-
-                break;
-
-        case DHCP6_STATE_BOUND:
-
-                break;
-
-        case DHCP6_STATE_STOPPED:
-                return 0;
-        }
-
-        if (r >= 0)
-                log_dhcp6_client(client, "Recv %s",
-                                 dhcp6_message_type_to_string(message->type));
-
-        return 0;
-}
-
-static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
-        int r;
-        usec_t timeout, time_now;
-        char time_string[FORMAT_TIMESPAN_MAX];
-
-        assert_return(client, -EINVAL);
-        assert_return(client->event, -EINVAL);
-        assert_return(client->index > 0, -EINVAL);
-        assert_return(client->state != state, -EINVAL);
-
-        client->timeout_resend_expire =
-                sd_event_source_unref(client->timeout_resend_expire);
-        client->timeout_resend = sd_event_source_unref(client->timeout_resend);
-        client->retransmit_time = 0;
-        client->retransmit_count = 0;
-
-        r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
-        if (r < 0)
-                return r;
-
-        switch (state) {
-        case DHCP6_STATE_STOPPED:
-                if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
-                        client->state = DHCP6_STATE_STOPPED;
-
-                        return 0;
-                }
-
-                /* fall through */
-        case DHCP6_STATE_SOLICITATION:
-                client->state = DHCP6_STATE_SOLICITATION;
-
-                break;
-
-        case DHCP6_STATE_INFORMATION_REQUEST:
-        case DHCP6_STATE_REQUEST:
-        case DHCP6_STATE_RENEW:
-        case DHCP6_STATE_REBIND:
-
-                client->state = state;
-
-                break;
-
-        case DHCP6_STATE_BOUND:
-
-                if (client->lease->ia.lifetime_t1 == 0xffffffff ||
-                    client->lease->ia.lifetime_t2 == 0xffffffff) {
-
-                        log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x",
-                                         be32toh(client->lease->ia.lifetime_t1),
-                                         be32toh(client->lease->ia.lifetime_t2));
-
-                        return 0;
-                }
-
-                timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t1) * USEC_PER_SEC);
-
-                log_dhcp6_client(client, "T1 expires in %s",
-                                 format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC));
-
-                r = sd_event_add_time(client->event,
-                                      &client->lease->ia.timeout_t1,
-                                      clock_boottime_or_monotonic(), time_now + timeout,
-                                      10 * USEC_PER_SEC, client_timeout_t1,
-                                      client);
-                if (r < 0)
-                        return r;
-
-                r = sd_event_source_set_priority(client->lease->ia.timeout_t1,
-                                                 client->event_priority);
-                if (r < 0)
-                        return r;
-
-                r = sd_event_source_set_description(client->lease->ia.timeout_t1, "dhcp6-t1-timeout");
-                if (r < 0)
-                        return r;
-
-                timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t2) * USEC_PER_SEC);
-
-                log_dhcp6_client(client, "T2 expires in %s",
-                                 format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC));
-
-                r = sd_event_add_time(client->event,
-                                      &client->lease->ia.timeout_t2,
-                                      clock_boottime_or_monotonic(), time_now + timeout,
-                                      10 * USEC_PER_SEC, client_timeout_t2,
-                                      client);
-                if (r < 0)
-                        return r;
-
-                r = sd_event_source_set_priority(client->lease->ia.timeout_t2,
-                                                 client->event_priority);
-                if (r < 0)
-                        return r;
-
-                r = sd_event_source_set_description(client->lease->ia.timeout_t2, "dhcp6-t2-timeout");
-                if (r < 0)
-                        return r;
-
-                client->state = state;
-
-                return 0;
-        }
-
-        client->transaction_id = random_u32() & htobe32(0x00ffffff);
-        client->transaction_start = time_now;
-
-        r = sd_event_add_time(client->event, &client->timeout_resend,
-                              clock_boottime_or_monotonic(), 0, 0, client_timeout_resend,
-                              client);
-        if (r < 0)
-                return r;
-
-        r = sd_event_source_set_priority(client->timeout_resend,
-                                         client->event_priority);
-        if (r < 0)
-                return r;
-
-        r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timeout");
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_dhcp6_client_stop(sd_dhcp6_client *client) {
-        assert_return(client, -EINVAL);
-
-        client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP);
-
-        return 0;
-}
-
-int sd_dhcp6_client_is_running(sd_dhcp6_client *client) {
-        assert_return(client, -EINVAL);
-
-        return client->state != DHCP6_STATE_STOPPED;
-}
-
-int sd_dhcp6_client_start(sd_dhcp6_client *client) {
-        int r = 0;
-        enum DHCP6State state = DHCP6_STATE_SOLICITATION;
-
-        assert_return(client, -EINVAL);
-        assert_return(client->event, -EINVAL);
-        assert_return(client->index > 0, -EINVAL);
-        assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL);
-
-        if (!IN_SET(client->state, DHCP6_STATE_STOPPED))
-                return -EBUSY;
-
-        r = client_reset(client);
-        if (r < 0)
-                return r;
-
-        r = client_ensure_iaid(client);
-        if (r < 0)
-                return r;
-
-        r = client_ensure_duid(client);
-        if (r < 0)
-                return r;
-
-        r = dhcp6_network_bind_udp_socket(client->index, &client->local_address);
-        if (r < 0) {
-                _cleanup_free_ char *p = NULL;
-
-                (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p);
-                return log_dhcp6_client_errno(client, r,
-                                              "Failed to bind to UDP socket at address %s: %m", strna(p));
-        }
-
-        client->fd = r;
-
-        r = sd_event_add_io(client->event, &client->receive_message,
-                            client->fd, EPOLLIN, client_receive_message,
-                            client);
-        if (r < 0)
-                goto error;
-
-        r = sd_event_source_set_priority(client->receive_message,
-                                         client->event_priority);
-        if (r < 0)
-                goto error;
-
-        r = sd_event_source_set_description(client->receive_message,
-                                            "dhcp6-receive-message");
-        if (r < 0)
-                goto error;
-
-        if (client->information_request)
-                state = DHCP6_STATE_INFORMATION_REQUEST;
-
-        log_dhcp6_client(client, "Started in %s mode",
-                         client->information_request? "Information request":
-                         "Managed");
-
-        return client_start(client, state);
-
-error:
-        client_reset(client);
-        return r;
-}
-
-int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) {
-        int r;
-
-        assert_return(client, -EINVAL);
-        assert_return(!client->event, -EBUSY);
-
-        if (event)
-                client->event = sd_event_ref(event);
-        else {
-                r = sd_event_default(&client->event);
-                if (r < 0)
-                        return 0;
-        }
-
-        client->event_priority = priority;
-
-        return 0;
-}
-
-int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) {
-        assert_return(client, -EINVAL);
-
-        client->event = sd_event_unref(client->event);
-
-        return 0;
-}
-
-sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) {
-        if (!client)
-                return NULL;
-
-        return client->event;
-}
-
-sd_dhcp6_client *sd_dhcp6_client_ref(sd_dhcp6_client *client) {
-
-        if (!client)
-                return NULL;
-
-        assert(client->n_ref >= 1);
-        client->n_ref++;
-
-        return client;
-}
-
-sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
-
-        if (!client)
-                return NULL;
-
-        assert(client->n_ref >= 1);
-        client->n_ref--;
-
-        if (client->n_ref > 0)
-                return NULL;
-
-        client_reset(client);
-
-        sd_dhcp6_client_detach_event(client);
-
-        free(client->req_opts);
-        free(client);
-
-        return NULL;
-}
-
-int sd_dhcp6_client_new(sd_dhcp6_client **ret) {
-        _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
-        size_t t;
-
-        assert_return(ret, -EINVAL);
-
-        client = new0(sd_dhcp6_client, 1);
-        if (!client)
-                return -ENOMEM;
-
-        client->n_ref = 1;
-
-        client->ia_na.type = SD_DHCP6_OPTION_IA_NA;
-
-        client->index = -1;
-
-        client->fd = -1;
-
-        client->req_opts_len = ELEMENTSOF(default_req_opts);
-
-        client->req_opts = new0(be16_t, client->req_opts_len);
-        if (!client->req_opts)
-                return -ENOMEM;
-
-        for (t = 0; t < client->req_opts_len; t++)
-                client->req_opts[t] = htobe16(default_req_opts[t]);
-
-        *ret = client;
-        client = NULL;
-
-        return 0;
-}