sd-netlink: rename from sd-rtnl

1 files changed, 0 insertions, 1699 deletions

diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
deleted file mode 100644
index 79e67f6953..0000000000
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ /dev/null
@@ -1,1699 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  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 <netinet/in.h>
-#include <stdbool.h>
-#include <unistd.h>
-
-#include "util.h"
-#include "socket-util.h"
-#include "formats-util.h"
-#include "refcnt.h"
-#include "missing.h"
-
-#include "sd-rtnl.h"
-#include "rtnl-util.h"
-#include "rtnl-internal.h"
-#include "rtnl-types.h"
-
-#define GET_CONTAINER(m, i) ((i) < (m)->n_containers ? (struct rtattr*)((uint8_t*)(m)->hdr + (m)->container_offsets[i]) : NULL)
-#define PUSH_CONTAINER(m, new) (m)->container_offsets[(m)->n_containers ++] = (uint8_t*)(new) - (uint8_t*)(m)->hdr;
-
-#define RTA_TYPE(rta) ((rta)->rta_type & NLA_TYPE_MASK)
-
-static int message_new_empty(sd_rtnl *rtnl, sd_rtnl_message **ret) {
-        sd_rtnl_message *m;
-
-        assert_return(ret, -EINVAL);
-
-        /* Note that 'rtnl' is currently unused, if we start using it internally
-           we must take care to avoid problems due to mutual references between
-           buses and their queued messages. See sd-bus.
-         */
-
-        m = new0(sd_rtnl_message, 1);
-        if (!m)
-                return -ENOMEM;
-
-        m->n_ref = REFCNT_INIT;
-
-        m->sealed = false;
-
-        *ret = m;
-
-        return 0;
-}
-
-int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type) {
-        _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
-        const NLType *nl_type;
-        size_t size;
-        int r;
-
-        r = type_system_get_type(NULL, &nl_type, type);
-        if (r < 0)
-                return r;
-
-        r = message_new_empty(rtnl, &m);
-        if (r < 0)
-                return r;
-
-        size = NLMSG_SPACE(nl_type->size);
-
-        assert(size >= sizeof(struct nlmsghdr));
-        m->hdr = malloc0(size);
-        if (!m->hdr)
-                return -ENOMEM;
-
-        m->hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-
-        m->container_type_system[0] = nl_type->type_system;
-        m->hdr->nlmsg_len = size;
-        m->hdr->nlmsg_type = type;
-
-        *ret = m;
-        m = NULL;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char prefixlen) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        if ((rtm->rtm_family == AF_INET && prefixlen > 32) ||
-            (rtm->rtm_family == AF_INET6 && prefixlen > 128))
-                return -ERANGE;
-
-        rtm->rtm_dst_len = prefixlen;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_set_src_prefixlen(sd_rtnl_message *m, unsigned char prefixlen) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        if ((rtm->rtm_family == AF_INET && prefixlen > 32) ||
-            (rtm->rtm_family == AF_INET6 && prefixlen > 128))
-                return -ERANGE;
-
-        rtm->rtm_src_len = prefixlen;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_set_scope(sd_rtnl_message *m, unsigned char scope) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        rtm->rtm_scope = scope;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_get_family(sd_rtnl_message *m, int *family) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(family, -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        *family = rtm->rtm_family;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_get_dst_prefixlen(sd_rtnl_message *m, unsigned char *dst_len) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(dst_len, -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        *dst_len = rtm->rtm_dst_len;
-
-        return 0;
-}
-
-int sd_rtnl_message_route_get_src_prefixlen(sd_rtnl_message *m, unsigned char *src_len) {
-        struct rtmsg *rtm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(src_len, -EINVAL);
-
-        rtm = NLMSG_DATA(m->hdr);
-
-        *src_len = rtm->rtm_src_len;
-
-        return 0;
-}
-
-int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                              uint16_t nlmsg_type, int rtm_family,
-                              unsigned char rtm_protocol) {
-        struct rtmsg *rtm;
-        int r;
-
-        assert_return(rtnl_message_type_is_route(nlmsg_type), -EINVAL);
-        assert_return((nlmsg_type == RTM_GETROUTE && rtm_family == AF_UNSPEC) ||
-                      rtm_family == AF_INET || rtm_family == AF_INET6, -EINVAL);
-        assert_return(ret, -EINVAL);
-
-        r = message_new(rtnl, ret, nlmsg_type);
-        if (r < 0)
-                return r;
-
-        if (nlmsg_type == RTM_NEWROUTE)
-                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
-
-        rtm = NLMSG_DATA((*ret)->hdr);
-
-        rtm->rtm_family = rtm_family;
-        rtm->rtm_scope = RT_SCOPE_UNIVERSE;
-        rtm->rtm_type = RTN_UNICAST;
-        rtm->rtm_table = RT_TABLE_MAIN;
-        rtm->rtm_protocol = rtm_protocol;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_set_flags(sd_rtnl_message *m, uint8_t flags) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-        ndm->ndm_flags |= flags;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_set_state(sd_rtnl_message *m, uint16_t state) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-        ndm->ndm_state |= state;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_get_flags(sd_rtnl_message *m, uint8_t *flags) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-        *flags = ndm->ndm_flags;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_get_state(sd_rtnl_message *m, uint16_t *state) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-        *state = ndm->ndm_state;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_get_family(sd_rtnl_message *m, int *family) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(family, -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-
-        *family = ndm->ndm_family;
-
-        return 0;
-}
-
-int sd_rtnl_message_neigh_get_ifindex(sd_rtnl_message *m, int *index) {
-        struct ndmsg *ndm;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(index, -EINVAL);
-
-        ndm = NLMSG_DATA(m->hdr);
-
-        *index = ndm->ndm_ifindex;
-
-        return 0;
-}
-
-int sd_rtnl_message_new_neigh(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t nlmsg_type, int index, int ndm_family) {
-        struct ndmsg *ndm;
-        int r;
-
-        assert_return(rtnl_message_type_is_neigh(nlmsg_type), -EINVAL);
-        assert_return(ndm_family == AF_INET  ||
-                      ndm_family == AF_INET6 ||
-                      ndm_family == PF_BRIDGE, -EINVAL);
-        assert_return(ret, -EINVAL);
-
-        r = message_new(rtnl, ret, nlmsg_type);
-        if (r < 0)
-                return r;
-
-        if (nlmsg_type == RTM_NEWNEIGH)
-                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
-
-        ndm = NLMSG_DATA((*ret)->hdr);
-
-        ndm->ndm_family = ndm_family;
-        ndm->ndm_ifindex = index;
-
-        return 0;
-}
-
-int sd_rtnl_message_link_set_flags(sd_rtnl_message *m, unsigned flags, unsigned change) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(change, -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        ifi->ifi_flags = flags;
-        ifi->ifi_change = change;
-
-        return 0;
-}
-
-int sd_rtnl_message_link_set_type(sd_rtnl_message *m, unsigned type) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        ifi->ifi_type = type;
-
-        return 0;
-}
-
-int sd_rtnl_message_link_set_family(sd_rtnl_message *m, unsigned family) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        ifi->ifi_family = family;
-
-        return 0;
-}
-
-int sd_rtnl_message_new_link(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                             uint16_t nlmsg_type, int index) {
-        struct ifinfomsg *ifi;
-        int r;
-
-        assert_return(rtnl_message_type_is_link(nlmsg_type), -EINVAL);
-        assert_return(nlmsg_type != RTM_DELLINK || index > 0, -EINVAL);
-        assert_return(ret, -EINVAL);
-
-        r = message_new(rtnl, ret, nlmsg_type);
-        if (r < 0)
-                return r;
-
-        if (nlmsg_type == RTM_NEWLINK)
-                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
-
-        ifi = NLMSG_DATA((*ret)->hdr);
-
-        ifi->ifi_family = AF_UNSPEC;
-        ifi->ifi_index = index;
-
-        return 0;
-}
-
-int sd_rtnl_message_request_dump(sd_rtnl_message *m, int dump) {
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(m->hdr->nlmsg_type == RTM_GETLINK  ||
-                      m->hdr->nlmsg_type == RTM_GETADDR  ||
-                      m->hdr->nlmsg_type == RTM_GETROUTE ||
-                      m->hdr->nlmsg_type == RTM_GETNEIGH,
-                      -EINVAL);
-
-        if (dump)
-                m->hdr->nlmsg_flags |= NLM_F_DUMP;
-        else
-                m->hdr->nlmsg_flags &= ~NLM_F_DUMP;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_set_prefixlen(sd_rtnl_message *m, unsigned char prefixlen) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        if ((ifa->ifa_family == AF_INET && prefixlen > 32) ||
-            (ifa->ifa_family == AF_INET6 && prefixlen > 128))
-                return -ERANGE;
-
-        ifa->ifa_prefixlen = prefixlen;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_set_flags(sd_rtnl_message *m, unsigned char flags) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        ifa->ifa_flags = flags;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_set_scope(sd_rtnl_message *m, unsigned char scope) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        ifa->ifa_scope = scope;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_get_family(sd_rtnl_message *m, int *family) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(family, -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        *family = ifa->ifa_family;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_get_prefixlen(sd_rtnl_message *m, unsigned char *prefixlen) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(prefixlen, -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        *prefixlen = ifa->ifa_prefixlen;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_get_scope(sd_rtnl_message *m, unsigned char *scope) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(scope, -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        *scope = ifa->ifa_scope;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_get_flags(sd_rtnl_message *m, unsigned char *flags) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(flags, -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        *flags = ifa->ifa_flags;
-
-        return 0;
-}
-
-int sd_rtnl_message_addr_get_ifindex(sd_rtnl_message *m, int *ifindex) {
-        struct ifaddrmsg *ifa;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(ifindex, -EINVAL);
-
-        ifa = NLMSG_DATA(m->hdr);
-
-        *ifindex = ifa->ifa_index;
-
-        return 0;
-}
-
-int sd_rtnl_message_new_addr(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                             uint16_t nlmsg_type, int index,
-                             int family) {
-        struct ifaddrmsg *ifa;
-        int r;
-
-        assert_return(rtnl_message_type_is_addr(nlmsg_type), -EINVAL);
-        assert_return((nlmsg_type == RTM_GETADDR && index == 0) ||
-                      index > 0, -EINVAL);
-        assert_return((nlmsg_type == RTM_GETADDR && family == AF_UNSPEC) ||
-                      family == AF_INET || family == AF_INET6, -EINVAL);
-        assert_return(ret, -EINVAL);
-
-        r = message_new(rtnl, ret, nlmsg_type);
-        if (r < 0)
-                return r;
-
-        if (nlmsg_type == RTM_GETADDR)
-                (*ret)->hdr->nlmsg_flags |= NLM_F_DUMP;
-
-        ifa = NLMSG_DATA((*ret)->hdr);
-
-        ifa->ifa_index = index;
-        ifa->ifa_family = family;
-        if (family == AF_INET)
-                ifa->ifa_prefixlen = 32;
-        else if (family == AF_INET6)
-                ifa->ifa_prefixlen = 128;
-
-        return 0;
-}
-
-int sd_rtnl_message_new_addr_update(sd_rtnl *rtnl, sd_rtnl_message **ret,
-                             int index, int family) {
-        int r;
-
-        r = sd_rtnl_message_new_addr(rtnl, ret, RTM_NEWADDR, index, family);
-        if (r < 0)
-                return r;
-
-        (*ret)->hdr->nlmsg_flags |= NLM_F_REPLACE;
-
-        return 0;
-}
-
-sd_rtnl_message *sd_rtnl_message_ref(sd_rtnl_message *m) {
-        if (m)
-                assert_se(REFCNT_INC(m->n_ref) >= 2);
-
-        return m;
-}
-
-sd_rtnl_message *sd_rtnl_message_unref(sd_rtnl_message *m) {
-        if (m && REFCNT_DEC(m->n_ref) == 0) {
-                unsigned i;
-
-                free(m->hdr);
-
-                for (i = 0; i <= m->n_containers; i++)
-                        free(m->rta_offset_tb[i]);
-
-                sd_rtnl_message_unref(m->next);
-
-                free(m);
-        }
-
-        return NULL;
-}
-
-int sd_rtnl_message_get_type(sd_rtnl_message *m, uint16_t *type) {
-        assert_return(m, -EINVAL);
-        assert_return(type, -EINVAL);
-
-        *type = m->hdr->nlmsg_type;
-
-        return 0;
-}
-
-int sd_rtnl_message_get_family(sd_rtnl_message *m, int *family) {
-        assert_return(m, -EINVAL);
-        assert_return(family, -EINVAL);
-
-        assert(m->hdr);
-
-        if (rtnl_message_type_is_link(m->hdr->nlmsg_type)) {
-                struct ifinfomsg *ifi;
-
-                ifi = NLMSG_DATA(m->hdr);
-
-                *family = ifi->ifi_family;
-
-                return 0;
-        } else if (rtnl_message_type_is_route(m->hdr->nlmsg_type)) {
-                struct rtmsg *rtm;
-
-                rtm = NLMSG_DATA(m->hdr);
-
-                *family = rtm->rtm_family;
-
-                return 0;
-        } else if (rtnl_message_type_is_neigh(m->hdr->nlmsg_type)) {
-                struct ndmsg *ndm;
-
-                ndm = NLMSG_DATA(m->hdr);
-
-                *family = ndm->ndm_family;
-
-                return 0;
-        } else if (rtnl_message_type_is_addr(m->hdr->nlmsg_type)) {
-                struct ifaddrmsg *ifa;
-
-                ifa = NLMSG_DATA(m->hdr);
-
-                *family = ifa->ifa_family;
-
-                return 0;
-        }
-
-        return -EOPNOTSUPP;
-}
-
-int sd_rtnl_message_is_broadcast(sd_rtnl_message *m) {
-        assert_return(m, -EINVAL);
-
-        return m->broadcast;
-}
-
-int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(ifindex, -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        *ifindex = ifi->ifi_index;
-
-        return 0;
-}
-
-int sd_rtnl_message_link_get_flags(sd_rtnl_message *m, unsigned *flags) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(flags, -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        *flags = ifi->ifi_flags;
-
-        return 0;
-}
-
-int sd_rtnl_message_link_get_type(sd_rtnl_message *m, unsigned *type) {
-        struct ifinfomsg *ifi;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-        assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
-        assert_return(type, -EINVAL);
-
-        ifi = NLMSG_DATA(m->hdr);
-
-        *type = ifi->ifi_type;
-
-        return 0;
-}
-
-/* If successful the updated message will be correctly aligned, if
-   unsuccessful the old message is untouched. */
-static int add_rtattr(sd_rtnl_message *m, unsigned short type, const void *data, size_t data_length) {
-        uint32_t rta_length;
-        size_t message_length, padding_length;
-        struct nlmsghdr *new_hdr;
-        struct rtattr *rta;
-        char *padding;
-        unsigned i;
-        int offset;
-
-        assert(m);
-        assert(m->hdr);
-        assert(!m->sealed);
-        assert(NLMSG_ALIGN(m->hdr->nlmsg_len) == m->hdr->nlmsg_len);
-        assert(!data || data_length);
-
-        /* get offset of the new attribute */
-        offset = m->hdr->nlmsg_len;
-
-        /* get the size of the new rta attribute (with padding at the end) */
-        rta_length = RTA_LENGTH(data_length);
-
-        /* get the new message size (with padding at the end) */
-        message_length = offset + RTA_ALIGN(rta_length);
-
-        /* realloc to fit the new attribute */
-        new_hdr = realloc(m->hdr, message_length);
-        if (!new_hdr)
-                return -ENOMEM;
-        m->hdr = new_hdr;
-
-        /* get pointer to the attribute we are about to add */
-        rta = (struct rtattr *) ((uint8_t *) m->hdr + offset);
-
-        /* if we are inside containers, extend them */
-        for (i = 0; i < m->n_containers; i++)
-                GET_CONTAINER(m, i)->rta_len += message_length - offset;
-
-        /* fill in the attribute */
-        rta->rta_type = type;
-        rta->rta_len = rta_length;
-        if (data)
-                /* we don't deal with the case where the user lies about the type
-                 * and gives us too little data (so don't do that)
-                 */
-                padding = mempcpy(RTA_DATA(rta), data, data_length);
-        else {
-                /* if no data was passed, make sure we still initialize the padding
-                   note that we can have data_length > 0 (used by some containers) */
-                padding = RTA_DATA(rta);
-        }
-
-        /* make sure also the padding at the end of the message is initialized */
-        padding_length = (uint8_t*)m->hdr + message_length - (uint8_t*)padding;
-        memzero(padding, padding_length);
-
-        /* update message size */
-        m->hdr->nlmsg_len = message_length;
-
-        return offset;
-}
-
-static int message_attribute_has_type(sd_rtnl_message *m, uint16_t attribute_type, uint16_t data_type) {
-        const NLType *type;
-        int r;
-
-        r = type_system_get_type(m->container_type_system[m->n_containers], &type, attribute_type);
-        if (r < 0)
-                return r;
-
-        if (type->type != data_type)
-                return -EINVAL;
-
-        return type->size;
-}
-
-int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data) {
-        size_t length, size;
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(data, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_STRING);
-        if (r < 0)
-                return r;
-        else
-                size = (size_t)r;
-
-        if (size) {
-                length = strnlen(data, size+1);
-                if (length > size)
-                        return -EINVAL;
-        } else
-                length = strlen(data);
-
-        r = add_rtattr(m, type, data, length + 1);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_u8(sd_rtnl_message *m, unsigned short type, uint8_t data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-
-        r = message_attribute_has_type(m, type, NLA_U8);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, &data, sizeof(uint8_t));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-
-int sd_rtnl_message_append_u16(sd_rtnl_message *m, unsigned short type, uint16_t data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-
-        r = message_attribute_has_type(m, type, NLA_U16);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, &data, sizeof(uint16_t));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_u32(sd_rtnl_message *m, unsigned short type, uint32_t data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-
-        r = message_attribute_has_type(m, type, NLA_U32);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, &data, sizeof(uint32_t));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_in_addr(sd_rtnl_message *m, unsigned short type, const struct in_addr *data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(data, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_IN_ADDR);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, data, sizeof(struct in_addr));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_in6_addr(sd_rtnl_message *m, unsigned short type, const struct in6_addr *data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(data, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_IN_ADDR);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, data, sizeof(struct in6_addr));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_ether_addr(sd_rtnl_message *m, unsigned short type, const struct ether_addr *data) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(data, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_ETHER_ADDR);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, data, ETH_ALEN);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_append_cache_info(sd_rtnl_message *m, unsigned short type, const struct ifa_cacheinfo *info) {
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(info, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_CACHE_INFO);
-        if (r < 0)
-                return r;
-
-        r = add_rtattr(m, type, info, sizeof(struct ifa_cacheinfo));
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
-        size_t size;
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -ERANGE);
-
-        r = message_attribute_has_type(m, type, NLA_NESTED);
-        if (r < 0) {
-                const NLTypeSystemUnion *type_system_union;
-                int family;
-
-                r = message_attribute_has_type(m, type, NLA_UNION);
-                if (r < 0)
-                        return r;
-                size = (size_t) r;
-
-                r = sd_rtnl_message_get_family(m, &family);
-                if (r < 0)
-                        return r;
-
-                r = type_system_get_type_system_union(m->container_type_system[m->n_containers], &type_system_union, type);
-                if (r < 0)
-                        return r;
-
-                r = type_system_union_protocol_get_type_system(type_system_union,
-                                                               &m->container_type_system[m->n_containers + 1],
-                                                               family);
-                if (r < 0)
-                        return r;
-        } else {
-                size = (size_t)r;
-
-                r = type_system_get_type_system(m->container_type_system[m->n_containers],
-                                                &m->container_type_system[m->n_containers + 1],
-                                                type);
-                if (r < 0)
-                        return r;
-        }
-
-        r = add_rtattr(m, type | NLA_F_NESTED, NULL, size);
-        if (r < 0)
-                return r;
-
-        m->container_offsets[m->n_containers ++] = r;
-
-        return 0;
-}
-
-int sd_rtnl_message_open_container_union(sd_rtnl_message *m, unsigned short type, const char *key) {
-        const NLTypeSystemUnion *type_system_union;
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-
-        r = type_system_get_type_system_union(m->container_type_system[m->n_containers], &type_system_union, type);
-        if (r < 0)
-                return r;
-
-        r = type_system_union_get_type_system(type_system_union,
-                                              &m->container_type_system[m->n_containers + 1],
-                                              key);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_message_append_string(m, type_system_union->match, key);
-        if (r < 0)
-                return r;
-
-        /* do we evere need non-null size */
-        r = add_rtattr(m, type, NULL, 0);
-        if (r < 0)
-                return r;
-
-        m->container_offsets[m->n_containers ++] = r;
-
-        return 0;
-}
-
-
-int sd_rtnl_message_close_container(sd_rtnl_message *m) {
-        assert_return(m, -EINVAL);
-        assert_return(!m->sealed, -EPERM);
-        assert_return(m->n_containers > 0, -EINVAL);
-
-        m->container_type_system[m->n_containers] = NULL;
-        m->n_containers --;
-
-        return 0;
-}
-
-int rtnl_message_read_internal(sd_rtnl_message *m, unsigned short type, void **data) {
-        struct rtattr *rta;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->sealed, -EPERM);
-        assert_return(data, -EINVAL);
-        assert(m->n_containers <= RTNL_CONTAINER_DEPTH);
-        assert(m->rta_offset_tb[m->n_containers]);
-        assert(type < m->rta_tb_size[m->n_containers]);
-
-        if(!m->rta_offset_tb[m->n_containers][type])
-                return -ENODATA;
-
-        rta = (struct rtattr*)((uint8_t *) m->hdr + m->rta_offset_tb[m->n_containers][type]);
-
-        *data = RTA_DATA(rta);
-
-        return RTA_PAYLOAD(rta);
-}
-
-int sd_rtnl_message_read_string(sd_rtnl_message *m, unsigned short type, const char **data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_STRING);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if (strnlen(attr_data, r) >= (size_t) r)
-                return -EIO;
-
-        if (data)
-                *data = (const char *) attr_data;
-
-        return 0;
-}
-
-int sd_rtnl_message_read_u8(sd_rtnl_message *m, unsigned short type, uint8_t *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_U8);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t) r < sizeof(uint8_t))
-                return -EIO;
-
-        if (data)
-                *data = *(uint8_t *) attr_data;
-
-        return 0;
-}
-
-int sd_rtnl_message_read_u16(sd_rtnl_message *m, unsigned short type, uint16_t *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_U16);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t) r < sizeof(uint16_t))
-                return -EIO;
-
-        if (data)
-                *data = *(uint16_t *) attr_data;
-
-        return 0;
-}
-
-int sd_rtnl_message_read_u32(sd_rtnl_message *m, unsigned short type, uint32_t *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_U32);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t)r < sizeof(uint32_t))
-                return -EIO;
-
-        if (data)
-                *data = *(uint32_t *) attr_data;
-
-        return 0;
-}
-
-int sd_rtnl_message_read_ether_addr(sd_rtnl_message *m, unsigned short type, struct ether_addr *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_ETHER_ADDR);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t)r < sizeof(struct ether_addr))
-                return -EIO;
-
-        if (data)
-                memcpy(data, attr_data, sizeof(struct ether_addr));
-
-        return 0;
-}
-
-int sd_rtnl_message_read_cache_info(sd_rtnl_message *m, unsigned short type, struct ifa_cacheinfo *info) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_CACHE_INFO);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t)r < sizeof(struct ifa_cacheinfo))
-                return -EIO;
-
-        if (info)
-                memcpy(info, attr_data, sizeof(struct ifa_cacheinfo));
-
-        return 0;
-}
-
-int sd_rtnl_message_read_in_addr(sd_rtnl_message *m, unsigned short type, struct in_addr *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_IN_ADDR);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t)r < sizeof(struct in_addr))
-                return -EIO;
-
-        if (data)
-                memcpy(data, attr_data, sizeof(struct in_addr));
-
-        return 0;
-}
-
-int sd_rtnl_message_read_in6_addr(sd_rtnl_message *m, unsigned short type, struct in6_addr *data) {
-        int r;
-        void *attr_data;
-
-        assert_return(m, -EINVAL);
-
-        r = message_attribute_has_type(m, type, NLA_IN_ADDR);
-        if (r < 0)
-                return r;
-
-        r = rtnl_message_read_internal(m, type, &attr_data);
-        if (r < 0)
-                return r;
-        else if ((size_t)r < sizeof(struct in6_addr))
-                return -EIO;
-
-        if (data)
-                memcpy(data, attr_data, sizeof(struct in6_addr));
-
-        return 0;
-}
-
-int sd_rtnl_message_enter_container(sd_rtnl_message *m, unsigned short type) {
-        const NLType *nl_type;
-        const NLTypeSystem *type_system;
-        void *container;
-        size_t size;
-        int r;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -EINVAL);
-
-        r = type_system_get_type(m->container_type_system[m->n_containers],
-                                 &nl_type,
-                                 type);
-        if (r < 0)
-                return r;
-
-        if (nl_type->type == NLA_NESTED) {
-                r = type_system_get_type_system(m->container_type_system[m->n_containers],
-                                                &type_system,
-                                                type);
-                if (r < 0)
-                        return r;
-        } else if (nl_type->type == NLA_UNION) {
-                const NLTypeSystemUnion *type_system_union;
-
-                r = type_system_get_type_system_union(m->container_type_system[m->n_containers],
-                                                      &type_system_union,
-                                                      type);
-                if (r < 0)
-                        return r;
-
-                switch (type_system_union->match_type) {
-                case NL_MATCH_SIBLING:
-                {
-                        const char *key;
-
-                        r = sd_rtnl_message_read_string(m, type_system_union->match, &key);
-                        if (r < 0)
-                                return r;
-
-                        r = type_system_union_get_type_system(type_system_union,
-                                                              &type_system,
-                                                              key);
-                        if (r < 0)
-                                return r;
-
-                        break;
-                }
-                case NL_MATCH_PROTOCOL:
-                {
-                        int family;
-
-                        r = sd_rtnl_message_get_family(m, &family);
-                        if (r < 0)
-                                return r;
-
-                        r = type_system_union_protocol_get_type_system(type_system_union,
-                                                                       &type_system,
-                                                                       family);
-                        if (r < 0)
-                                return r;
-
-                        break;
-                }
-                default:
-                        assert_not_reached("sd-rtnl: invalid type system union type");
-                }
-        } else
-                return -EINVAL;
-
-        r = rtnl_message_read_internal(m, type, &container);
-        if (r < 0)
-                return r;
-        else
-                size = (size_t)r;
-
-        m->n_containers ++;
-
-        r = rtnl_message_parse(m,
-                               &m->rta_offset_tb[m->n_containers],
-                               &m->rta_tb_size[m->n_containers],
-                               type_system->max,
-                               container,
-                               size);
-        if (r < 0) {
-                m->n_containers --;
-                return r;
-        }
-
-        m->container_type_system[m->n_containers] = type_system;
-
-        return 0;
-}
-
-int sd_rtnl_message_exit_container(sd_rtnl_message *m) {
-        assert_return(m, -EINVAL);
-        assert_return(m->sealed, -EINVAL);
-        assert_return(m->n_containers > 0, -EINVAL);
-
-        free(m->rta_offset_tb[m->n_containers]);
-        m->rta_offset_tb[m->n_containers] = NULL;
-        m->container_type_system[m->n_containers] = NULL;
-
-        m->n_containers --;
-
-        return 0;
-}
-
-uint32_t rtnl_message_get_serial(sd_rtnl_message *m) {
-        assert(m);
-        assert(m->hdr);
-
-        return m->hdr->nlmsg_seq;
-}
-
-int sd_rtnl_message_is_error(sd_rtnl_message *m) {
-        assert_return(m, 0);
-        assert_return(m->hdr, 0);
-
-        return m->hdr->nlmsg_type == NLMSG_ERROR;
-}
-
-int sd_rtnl_message_get_errno(sd_rtnl_message *m) {
-        struct nlmsgerr *err;
-
-        assert_return(m, -EINVAL);
-        assert_return(m->hdr, -EINVAL);
-
-        if (!sd_rtnl_message_is_error(m))
-                return 0;
-
-        err = NLMSG_DATA(m->hdr);
-
-        return err->error;
-}
-
-int rtnl_message_parse(sd_rtnl_message *m,
-                       size_t **rta_offset_tb,
-                       unsigned short *rta_tb_size,
-                       int max,
-                       struct rtattr *rta,
-                       unsigned int rt_len) {
-        unsigned short type;
-        size_t *tb;
-
-        tb = new0(size_t, max + 1);
-        if(!tb)
-                return -ENOMEM;
-
-        *rta_tb_size = max + 1;
-
-        for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) {
-                type = RTA_TYPE(rta);
-
-                /* if the kernel is newer than the headers we used
-                   when building, we ignore out-of-range attributes
-                 */
-                if (type > max)
-                        continue;
-
-                if (tb[type])
-                        log_debug("rtnl: message parse - overwriting repeated attribute");
-
-                tb[type] = (uint8_t *) rta - (uint8_t *) m->hdr;
-        }
-
-        *rta_offset_tb = tb;
-
-        return 0;
-}
-
-/* returns the number of bytes sent, or a negative error code */
-int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_nl nl;
-        } addr = {
-                .nl.nl_family = AF_NETLINK,
-        };
-        ssize_t k;
-
-        assert(nl);
-        assert(m);
-        assert(m->hdr);
-
-        k = sendto(nl->fd, m->hdr, m->hdr->nlmsg_len,
-                        0, &addr.sa, sizeof(addr));
-        if (k < 0)
-                return (errno == EAGAIN) ? 0 : -errno;
-
-        return k;
-}
-
-static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool peek) {
-        union sockaddr_union sender;
-        uint8_t cmsg_buffer[CMSG_SPACE(sizeof(struct nl_pktinfo))];
-        struct msghdr msg = {
-                .msg_iov = iov,
-                .msg_iovlen = 1,
-                .msg_name = &sender,
-                .msg_namelen = sizeof(sender),
-                .msg_control = cmsg_buffer,
-                .msg_controllen = sizeof(cmsg_buffer),
-        };
-        struct cmsghdr *cmsg;
-        uint32_t group = 0;
-        int r;
-
-        assert(fd >= 0);
-        assert(iov);
-
-        r = recvmsg(fd, &msg, MSG_TRUNC | (peek ? MSG_PEEK : 0));
-        if (r < 0) {
-                /* no data */
-                if (errno == ENOBUFS)
-                        log_debug("rtnl: kernel receive buffer overrun");
-                else if (errno == EAGAIN)
-                        log_debug("rtnl: no data in socket");
-
-                return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
-        }
-
-        if (sender.nl.nl_pid != 0) {
-                /* not from the kernel, ignore */
-                log_debug("rtnl: ignoring message from portid %"PRIu32, sender.nl.nl_pid);
-
-                if (peek) {
-                        /* drop the message */
-                        r = recvmsg(fd, &msg, 0);
-                        if (r < 0)
-                                return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
-                }
-
-                return 0;
-        }
-
-        CMSG_FOREACH(cmsg, &msg) {
-                if (cmsg->cmsg_level == SOL_NETLINK &&
-                    cmsg->cmsg_type == NETLINK_PKTINFO &&
-                    cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) {
-                        struct nl_pktinfo *pktinfo = (void *)CMSG_DATA(cmsg);
-
-                        /* multi-cast group */
-                        group = pktinfo->group;
-                }
-        }
-
-        if (_group)
-                *_group = group;
-
-        return r;
-}
-
-/* On success, the number of bytes received is returned and *ret points to the received message
- * which has a valid header and the correct size.
- * If nothing useful was received 0 is returned.
- * On failure, a negative error code is returned.
- */
-int socket_read_message(sd_rtnl *rtnl) {
-        _cleanup_rtnl_message_unref_ sd_rtnl_message *first = NULL;
-        struct iovec iov = {};
-        uint32_t group = 0;
-        bool multi_part = false, done = false;
-        struct nlmsghdr *new_msg;
-        size_t len;
-        int r;
-        unsigned i = 0;
-
-        assert(rtnl);
-        assert(rtnl->rbuffer);
-        assert(rtnl->rbuffer_allocated >= sizeof(struct nlmsghdr));
-
-        /* read nothing, just get the pending message size */
-        r = socket_recv_message(rtnl->fd, &iov, NULL, true);
-        if (r <= 0)
-                return r;
-        else
-                len = (size_t)r;
-
-        /* make room for the pending message */
-        if (!greedy_realloc((void **)&rtnl->rbuffer,
-                            &rtnl->rbuffer_allocated,
-                            len, sizeof(uint8_t)))
-                return -ENOMEM;
-
-        iov.iov_base = rtnl->rbuffer;
-        iov.iov_len = rtnl->rbuffer_allocated;
-
-        /* read the pending message */
-        r = socket_recv_message(rtnl->fd, &iov, &group, false);
-        if (r <= 0)
-                return r;
-        else
-                len = (size_t)r;
-
-        if (len > rtnl->rbuffer_allocated)
-                /* message did not fit in read buffer */
-                return -EIO;
-
-        if (NLMSG_OK(rtnl->rbuffer, len) && rtnl->rbuffer->nlmsg_flags & NLM_F_MULTI) {
-                multi_part = true;
-
-                for (i = 0; i < rtnl->rqueue_partial_size; i++) {
-                        if (rtnl_message_get_serial(rtnl->rqueue_partial[i]) ==
-                            rtnl->rbuffer->nlmsg_seq) {
-                                first = rtnl->rqueue_partial[i];
-                                break;
-                        }
-                }
-        }
-
-        for (new_msg = rtnl->rbuffer; NLMSG_OK(new_msg, len) && !done; new_msg = NLMSG_NEXT(new_msg, len)) {
-                _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
-                const NLType *nl_type;
-
-                if (!group && new_msg->nlmsg_pid != rtnl->sockaddr.nl.nl_pid)
-                        /* not broadcast and not for us */
-                        continue;
-
-                if (new_msg->nlmsg_type == NLMSG_NOOP)
-                        /* silently drop noop messages */
-                        continue;
-
-                if (new_msg->nlmsg_type == NLMSG_DONE) {
-                        /* finished reading multi-part message */
-                        done = true;
-
-                        /* if first is not defined, put NLMSG_DONE into the receive queue. */
-                        if (first)
-                                continue;
-                }
-
-                /* check that we support this message type */
-                r = type_system_get_type(NULL, &nl_type, new_msg->nlmsg_type);
-                if (r < 0) {
-                        if (r == -EOPNOTSUPP)
-                                log_debug("sd-rtnl: ignored message with unknown type: %i",
-                                          new_msg->nlmsg_type);
-
-                        continue;
-                }
-
-                /* check that the size matches the message type */
-                if (new_msg->nlmsg_len < NLMSG_LENGTH(nl_type->size)) {
-                        log_debug("sd-rtnl: message larger than expected, dropping");
-                        continue;
-                }
-
-                r = message_new_empty(rtnl, &m);
-                if (r < 0)
-                        return r;
-
-                m->broadcast = !!group;
-
-                m->hdr = memdup(new_msg, new_msg->nlmsg_len);
-                if (!m->hdr)
-                        return -ENOMEM;
-
-                /* seal and parse the top-level message */
-                r = sd_rtnl_message_rewind(m);
-                if (r < 0)
-                        return r;
-
-                /* push the message onto the multi-part message stack */
-                if (first)
-                        m->next = first;
-                first = m;
-                m = NULL;
-        }
-
-        if (len)
-                log_debug("sd-rtnl: discarding %zu bytes of incoming message", len);
-
-        if (!first)
-                return 0;
-
-        if (!multi_part || done) {
-                /* we got a complete message, push it on the read queue */
-                r = rtnl_rqueue_make_room(rtnl);
-                if (r < 0)
-                        return r;
-
-                rtnl->rqueue[rtnl->rqueue_size ++] = first;
-                first = NULL;
-
-                if (multi_part && (i < rtnl->rqueue_partial_size)) {
-                        /* remove the message form the partial read queue */
-                        memmove(rtnl->rqueue_partial + i,rtnl->rqueue_partial + i + 1,
-                                sizeof(sd_rtnl_message*) * (rtnl->rqueue_partial_size - i - 1));
-                        rtnl->rqueue_partial_size --;
-                }
-
-                return 1;
-        } else {
-                /* we only got a partial multi-part message, push it on the
-                   partial read queue */
-                if (i < rtnl->rqueue_partial_size) {
-                        rtnl->rqueue_partial[i] = first;
-                } else {
-                        r = rtnl_rqueue_partial_make_room(rtnl);
-                        if (r < 0)
-                                return r;
-
-                        rtnl->rqueue_partial[rtnl->rqueue_partial_size ++] = first;
-                }
-                first = NULL;
-
-                return 0;
-        }
-}
-
-int sd_rtnl_message_rewind(sd_rtnl_message *m) {
-        const NLType *type;
-        unsigned i;
-        int r;
-
-        assert_return(m, -EINVAL);
-
-        /* don't allow appending to message once parsed */
-        if (!m->sealed)
-                rtnl_message_seal(m);
-
-        for (i = 1; i <= m->n_containers; i++) {
-                free(m->rta_offset_tb[i]);
-                m->rta_offset_tb[i] = NULL;
-                m->rta_tb_size[i] = 0;
-                m->container_type_system[i] = NULL;
-        }
-
-        m->n_containers = 0;
-
-        if (m->rta_offset_tb[0]) {
-                /* top-level attributes have already been parsed */
-                return 0;
-        }
-
-        assert(m->hdr);
-
-        r = type_system_get_type(NULL, &type, m->hdr->nlmsg_type);
-        if (r < 0)
-                return r;
-
-        if (type->type == NLA_NESTED) {
-                const NLTypeSystem *type_system = type->type_system;
-
-                assert(type_system);
-
-                m->container_type_system[0] = type_system;
-
-                r = rtnl_message_parse(m,
-                                       &m->rta_offset_tb[m->n_containers],
-                                       &m->rta_tb_size[m->n_containers],
-                                       type_system->max,
-                                       (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) +
-                                                        NLMSG_ALIGN(type->size)),
-                                       NLMSG_PAYLOAD(m->hdr, type->size));
-                if (r < 0)
-                        return r;
-        }
-
-        return 0;
-}
-
-void rtnl_message_seal(sd_rtnl_message *m) {
-        assert(m);
-        assert(!m->sealed);
-
-        m->sealed = true;
-}
-
-sd_rtnl_message *sd_rtnl_message_next(sd_rtnl_message *m) {
-        assert_return(m, NULL);
-
-        return m->next;
-}