[systemd-devel] [PATCH v3] Add FDB support
Tom Gundersen
teg at jklm.no
Thu Dec 18 06:45:48 PST 2014
Hi Alin,
Looks good. I changed the title a bit (addedd "networkd:") and dropped
the signed off by, as we don't use that, and pushed it.
Thanks for your work!
Cheers,
Tom
On Wed, Dec 17, 2014 at 4:35 PM, Alin Rauta <alin.rauta at intel.com> wrote:
> Signed-off-by: Alin Rauta <alin.rauta at intel.com>
> ---
> Makefile.am | 1 +
> man/systemd.network.xml | 22 +++
> src/libsystemd/sd-rtnl/rtnl-message.c | 56 ++++++-
> src/libsystemd/sd-rtnl/rtnl-types.c | 15 +-
> src/network/networkd-fdb.c | 252 +++++++++++++++++++++++++++++++
> src/network/networkd-link.c | 19 +++
> src/network/networkd-network-gperf.gperf | 2 +
> src/network/networkd-network.c | 13 +-
> src/network/networkd.h | 29 ++++
> src/systemd/sd-rtnl.h | 4 +
> 10 files changed, 402 insertions(+), 11 deletions(-)
> create mode 100644 src/network/networkd-fdb.c
>
> diff --git a/Makefile.am b/Makefile.am
> index ab07d3b..6896c4b 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -5281,6 +5281,7 @@ libsystemd_networkd_core_la_SOURCES = \
> src/network/networkd-address.c \
> src/network/networkd-route.c \
> src/network/networkd-manager.c \
> + src/network/networkd-fdb.c \
> src/network/networkd-address-pool.c
>
> nodist_libsystemd_networkd_core_la_SOURCES = \
> diff --git a/man/systemd.network.xml b/man/systemd.network.xml
> index 79c7a23..360c57c 100644
> --- a/man/systemd.network.xml
> +++ b/man/systemd.network.xml
> @@ -549,6 +549,28 @@
> </refsect1>
>
> <refsect1>
> + <title>[BridgeFDB] Section Options</title>
> + <para>The <literal>[BridgeFDB]</literal> section manages the forwarding database table of a port and accepts the following keys. Specify
> + several <literal>[BridgeFDB]</literal> sections to configure several static MAC table entries.</para>
> +
> + <variablelist class='network-directives'>
> + <varlistentry>
> + <term><varname>MACAddress=</varname></term>
> + <listitem>
> + <para>As in the <literal>[Network]</literal> section. This key is mandatory.</para>
> + </listitem>
> + </varlistentry>
> + <varlistentry>
> + <term><varname>VLANId=</varname></term>
> + <listitem>
> + <para>The VLAN Id for the new static MAC table entry.
> + If omitted, no VLAN Id info is appended to the new static MAC table entry.</para>
> + </listitem>
> + </varlistentry>
> + </variablelist>
> + </refsect1>
> +
> + <refsect1>
> <title>Example</title>
> <example>
> <title>/etc/systemd/network/50-static.network</title>
> diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
> index 165e84d..9099440 100644
> --- a/src/libsystemd/sd-rtnl/rtnl-message.c
> +++ b/src/libsystemd/sd-rtnl/rtnl-message.c
> @@ -220,6 +220,58 @@ int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret,
> 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;
>
> @@ -255,7 +307,9 @@ int sd_rtnl_message_new_neigh(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t nlm
> int r;
>
> assert_return(rtnl_message_type_is_neigh(nlmsg_type), -EINVAL);
> - assert_return(ndm_family == AF_INET || ndm_family == AF_INET6, -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);
> diff --git a/src/libsystemd/sd-rtnl/rtnl-types.c b/src/libsystemd/sd-rtnl/rtnl-types.c
> index a1db2ab..735ad75 100644
> --- a/src/libsystemd/sd-rtnl/rtnl-types.c
> +++ b/src/libsystemd/sd-rtnl/rtnl-types.c
> @@ -332,15 +332,12 @@ static const NLTypeSystem rtnl_route_type_system = {
> static const NLType rtnl_neigh_types[NDA_MAX + 1] = {
> [NDA_DST] = { .type = NLA_IN_ADDR },
> [NDA_LLADDR] = { .type = NLA_ETHER_ADDR },
> -/*
> - NDA_CACHEINFO,
> - NDA_PROBES,
> - NDA_VLAN,
> - NDA_PORT
> - NDA_VNI
> - NDA_IFINDEX
> - NDA_MASTER
> -*/
> + [NDA_CACHEINFO] = { .type = NLA_CACHE_INFO, .size = sizeof(struct nda_cacheinfo) },
> + [NDA_PROBES] = { .type = NLA_U32 },
> + [NDA_VLAN] = { .type = NLA_U16 },
> + [NDA_PORT] = { .type = NLA_U16 },
> + [NDA_VNI] = { .type = NLA_U32 },
> + [NDA_IFINDEX] = { .type = NLA_U32 },
> };
>
> static const NLTypeSystem rtnl_neigh_type_system = {
> diff --git a/src/network/networkd-fdb.c b/src/network/networkd-fdb.c
> new file mode 100644
> index 0000000..9bb45e3
> --- /dev/null
> +++ b/src/network/networkd-fdb.c
> @@ -0,0 +1,252 @@
> +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
> +
> +/***
> + This file is part of systemd.
> +
> + Copyright (C) 2014 Intel Corporation. All rights reserved.
> +
> + systemd is free software; you can redistribute it and/or modify it
> + under the terms of the GNU Lesser General Public License as published by
> + the Free Software Foundation; either version 2.1 of the License, or
> + (at your option) any later version.
> +
> + systemd is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public License
> + along with systemd; If not, see <http://www.gnu.org/licenses/>.
> +***/
> +
> +#include <ctype.h>
> +#include <net/if.h>
> +#include <net/ethernet.h>
> +
> +#include "networkd.h"
> +#include "networkd-netdev.h"
> +#include "networkd-link.h"
> +#include "network-internal.h"
> +#include "path-util.h"
> +#include "conf-files.h"
> +#include "conf-parser.h"
> +#include "util.h"
> +
> +/* create a new FDB entry or get an existing one. */
> +int fdb_entry_new_static(Network *const network,
> + const unsigned section,
> + FdbEntry **ret) {
> + _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
> + struct ether_addr *mac_addr = NULL;
> +
> + assert(network);
> +
> + /* search entry in hashmap first. */
> + if(section) {
> + fdb_entry = hashmap_get(network->fdb_entries_by_section, UINT_TO_PTR(section));
> + if (fdb_entry) {
> + *ret = fdb_entry;
> + fdb_entry = NULL;
> +
> + return 0;
> + }
> + }
> +
> + /* allocate space for MAC address. */
> + mac_addr = new0(struct ether_addr, 1);
> + if (!mac_addr)
> + return -ENOMEM;
> +
> + /* allocate space for and FDB entry. */
> + fdb_entry = new0(FdbEntry, 1);
> +
> + if (!fdb_entry) {
> + /* free previously allocated space for mac_addr. */
> + free(mac_addr);
> + return -ENOMEM;
> + }
> +
> + /* init FDB structure. */
> + fdb_entry->network = network;
> + fdb_entry->mac_addr = mac_addr;
> +
> + LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry);
> +
> + if (section) {
> + fdb_entry->section = section;
> + hashmap_put(network->fdb_entries_by_section,
> + UINT_TO_PTR(fdb_entry->section), fdb_entry);
> + }
> +
> + /* return allocated FDB structure. */
> + *ret = fdb_entry;
> + fdb_entry = NULL;
> +
> + return 0;
> +}
> +
> +static int set_fdb_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
> + _cleanup_fdbentry_free_ FdbEntry *fdb_entry = userdata;
> + int r;
> +
> + assert(fdb_entry);
> +
> + r = sd_rtnl_message_get_errno(m);
> + if ((r < 0) && (r != (-EEXIST)))
> + log_error("Could not add FDB entry for interface: %s error: %s",
> + fdb_entry->network->match_name, strerror(-r));
> +
> + return 1;
> +}
> +
> +/* send a request to the kernel to add a FDB entry in its static MAC table. */
> +int fdb_entry_configure(sd_rtnl *const rtnl,
> + FdbEntry *const fdb_entry,
> + const int ifindex) {
> + _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
> + int r;
> +
> + assert(fdb_entry);
> + assert(rtnl);
> +
> + /* create new RTM message */
> + r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, ifindex, PF_BRIDGE);
> + if (r < 0)
> + return rtnl_log_create_error(r);
> +
> + /* only NTF_SELF flag supported. */
> + r = sd_rtnl_message_neigh_set_flags(req, NTF_SELF);
> + if (r < 0)
> + return rtnl_log_create_error(r);
> +
> + /* only NUD_PERMANENT state supported. */
> + r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT);
> + if (r < 0)
> + return rtnl_log_create_error(r);
> +
> + r = sd_rtnl_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr);
> + if (r < 0)
> + return rtnl_log_create_error(r);
> +
> + /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
> + if (0 != fdb_entry->vlan_id) {
> + r = sd_rtnl_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id);
> + if (r < 0)
> + return rtnl_log_create_error(r);
> + }
> +
> + /* send message to the kernel to update its internal static MAC table. */
> + r = sd_rtnl_call_async(rtnl, req, set_fdb_handler, fdb_entry, 0, NULL);
> + if (r < 0) {
> + log_error("Could not send rtnetlink message: %s", strerror(-r));
> + return r;
> + }
> +
> + return 0;
> +}
> +
> +/* remove and FDB entry. */
> +void fdb_entry_free(FdbEntry *fdb_entry) {
> + if(!fdb_entry)
> + return;
> +
> + if(fdb_entry->network) {
> + LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries,
> + fdb_entry);
> +
> + if(fdb_entry->section)
> + hashmap_remove(fdb_entry->network->fdb_entries_by_section,
> + UINT_TO_PTR(fdb_entry->section));
> + }
> +
> + free(fdb_entry->mac_addr);
> +
> + free(fdb_entry);
> +}
> +
> +/* parse the HW address from config files. */
> +int config_parse_fdb_hwaddr(const char *unit,
> + const char *filename,
> + unsigned line,
> + const char *section,
> + unsigned section_line,
> + const char *lvalue,
> + int ltype,
> + const char *rvalue,
> + void *data,
> + void *userdata) {
> + Network *network = userdata;
> + _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
> + int r;
> +
> + assert(filename);
> + assert(section);
> + assert(lvalue);
> + assert(rvalue);
> + assert(data);
> +
> + r = fdb_entry_new_static(network, section_line, &fdb_entry);
> + if (r < 0) {
> + log_error("Failed to allocate a new FDB entry: %s", strerror(-r));
> + return r;
> + }
> +
> + /* read in the MAC address for the FDB table. */
> + r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
> + &fdb_entry->mac_addr->ether_addr_octet[0],
> + &fdb_entry->mac_addr->ether_addr_octet[1],
> + &fdb_entry->mac_addr->ether_addr_octet[2],
> + &fdb_entry->mac_addr->ether_addr_octet[3],
> + &fdb_entry->mac_addr->ether_addr_octet[4],
> + &fdb_entry->mac_addr->ether_addr_octet[5]);
> +
> + if (ETHER_ADDR_LEN != r) {
> + log_syntax(unit, LOG_ERR, filename, line, EINVAL,
> + "Not a valid MAC address, ignoring assignment: %s", rvalue);
> + return 0;
> + }
> +
> + fdb_entry = NULL;
> +
> + return 0;
> +}
> +
> +/* parse the VLAN Id from config files. */
> +int config_parse_fdb_vlan_id(const char *unit,
> + const char *filename,
> + unsigned line,
> + const char *section,
> + unsigned section_line,
> + const char *lvalue,
> + int ltype,
> + const char *rvalue,
> + void *data,
> + void *userdata) {
> + Network *network = userdata;
> + _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
> + int r;
> +
> + assert(filename);
> + assert(section);
> + assert(lvalue);
> + assert(rvalue);
> + assert(data);
> +
> + r = fdb_entry_new_static(network, section_line, &fdb_entry);
> + if (r < 0) {
> + log_error("Failed to allocate a new FDB entry: %s", strerror(-r));
> + return r;
> + }
> +
> + r = config_parse_unsigned(unit, filename, line, section,
> + section_line, lvalue, ltype,
> + rvalue, &fdb_entry->vlan_id, userdata);
> + if (r < 0) {
> + log_error("Failed to parse the unsigned integer: %s", strerror(-r));
> + return r;
> + }
> +
> + fdb_entry = NULL;
> +
> + return 0;
> +}
> diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
> index 08f724e..341ae88 100644
> --- a/src/network/networkd-link.c
> +++ b/src/network/networkd-link.c
> @@ -656,6 +656,21 @@ int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
> return 1;
> }
>
> +static int link_set_bridge_fdb(const Link *const link) {
> + FdbEntry *fdb_entry;
> + int r = 0;
> +
> + LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
> + r = fdb_entry_configure(link->manager->rtnl, fdb_entry, link->ifindex);
> + if(r < 0) {
> + log_link_error(link, "Failed to add MAC entry to static MAC table: %s", strerror(-r));
> + break;
> + }
> + }
> +
> + return r;
> +}
> +
> static int link_set_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
> _cleanup_link_unref_ Link *link = userdata;
> int r;
> @@ -1147,6 +1162,10 @@ static int link_configure(Link *link) {
> assert(link->network);
> assert(link->state == LINK_STATE_PENDING);
>
> + r = link_set_bridge_fdb(link);
> + if (r < 0)
> + return r;
> +
> if (link_ipv4ll_enabled(link)) {
> r = ipv4ll_configure(link);
> if (r < 0)
> diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
> index 640a3a2..fb0a209 100644
> --- a/src/network/networkd-network-gperf.gperf
> +++ b/src/network/networkd-network-gperf.gperf
> @@ -62,6 +62,8 @@ DHCP.CriticalConnection, config_parse_bool, 0,
> DHCP.VendorClassIdentifier, config_parse_string, 0, offsetof(Network, dhcp_vendor_class_identifier)
> DHCP.RouteMetric, config_parse_unsigned, 0, offsetof(Network, dhcp_route_metric)
> Bridge.Cost, config_parse_unsigned, 0, offsetof(Network, cost)
> +BridgeFDB.MACAddress, config_parse_fdb_hwaddr, 0, 0
> +BridgeFDB.VLANId, config_parse_fdb_vlan_id, 0, 0
> /* backwards compatibility: do not add new entries to this section */
> DHCPv4.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp_dns)
> DHCPv4.UseMTU, config_parse_bool, 0, offsetof(Network, dhcp_mtu)
> diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
> index ef9e0a8..966b59b 100644
> --- a/src/network/networkd-network.c
> +++ b/src/network/networkd-network.c
> @@ -62,6 +62,7 @@ static int network_load_one(Manager *manager, const char *filename) {
>
> LIST_HEAD_INIT(network->static_addresses);
> LIST_HEAD_INIT(network->static_routes);
> + LIST_HEAD_INIT(network->static_fdb_entries);
>
> network->stacked_netdevs = hashmap_new(&string_hash_ops);
> if (!network->stacked_netdevs)
> @@ -75,6 +76,10 @@ static int network_load_one(Manager *manager, const char *filename) {
> if (!network->routes_by_section)
> return log_oom();
>
> + network->fdb_entries_by_section = hashmap_new(NULL);
> + if (!network->fdb_entries_by_section)
> + return log_oom();
> +
> network->filename = strdup(filename);
> if (!network->filename)
> return log_oom();
> @@ -97,7 +102,8 @@ static int network_load_one(Manager *manager, const char *filename) {
> "Route\0"
> "DHCP\0"
> "DHCPv4\0"
> - "Bridge\0",
> + "Bridge\0"
> + "BridgeFDB\0",
> config_item_perf_lookup, network_network_gperf_lookup,
> false, false, true, network);
> if (r < 0)
> @@ -154,6 +160,7 @@ void network_free(Network *network) {
> NetDev *netdev;
> Route *route;
> Address *address;
> + FdbEntry *fdb_entry;
> Iterator i;
>
> if (!network)
> @@ -192,8 +199,12 @@ void network_free(Network *network) {
> while ((address = network->static_addresses))
> address_free(address);
>
> + while ((fdb_entry = network->static_fdb_entries))
> + fdb_entry_free(fdb_entry);
> +
> hashmap_free(network->addresses_by_section);
> hashmap_free(network->routes_by_section);
> + hashmap_free(network->fdb_entries_by_section);
>
> if (network->manager && network->manager->networks)
> LIST_REMOVE(networks, network->manager->networks, network);
> diff --git a/src/network/networkd.h b/src/network/networkd.h
> index 4cdcd73..a5c5b08 100644
> --- a/src/network/networkd.h
> +++ b/src/network/networkd.h
> @@ -51,6 +51,7 @@ typedef struct Address Address;
> typedef struct Route Route;
> typedef struct Manager Manager;
> typedef struct AddressPool AddressPool;
> +typedef struct FdbEntry FdbEntry;
>
> typedef enum DHCPSupport {
> DHCP_SUPPORT_NONE,
> @@ -69,6 +70,16 @@ typedef enum LLMNRSupport {
> _LLMNR_SUPPORT_INVALID = -1,
> } LLMNRSupport;
>
> +struct FdbEntry {
> + Network *network;
> + unsigned section;
> +
> + struct ether_addr *mac_addr;
> + uint16_t vlan_id;
> +
> + LIST_FIELDS(FdbEntry, static_fdb_entries);
> +};
> +
> struct Network {
> Manager *manager;
>
> @@ -113,9 +124,11 @@ struct Network {
>
> LIST_HEAD(Address, static_addresses);
> LIST_HEAD(Route, static_routes);
> + LIST_HEAD(FdbEntry, static_fdb_entries);
>
> Hashmap *addresses_by_section;
> Hashmap *routes_by_section;
> + Hashmap *fdb_entries_by_section;
>
> bool wildcard_domain;
> char **domains, **dns, **ntp;
> @@ -327,6 +340,22 @@ int config_parse_label(const char *unit, const char *filename, unsigned line,
> const char *section, unsigned section_line, const char *lvalue,
> int ltype, const char *rvalue, void *data, void *userdata);
>
> +/* Forwarding database table. */
> +int fdb_entry_configure(sd_rtnl *const rtnl, FdbEntry *const fdb_entry, const int ifindex);
> +void fdb_entry_free(FdbEntry *fdb_entry);
> +int fdb_entry_new_static(Network *const network, const unsigned section, FdbEntry **ret);
> +
> +DEFINE_TRIVIAL_CLEANUP_FUNC(FdbEntry*, fdb_entry_free);
> +#define _cleanup_fdbentry_free_ _cleanup_(fdb_entry_freep)
> +
> +int config_parse_fdb_hwaddr(const char *unit, const char *filename, unsigned line,
> + const char *section, unsigned section_line, const char *lvalue,
> + int ltype, const char *rvalue, void *data, void *userdata);
> +
> +int config_parse_fdb_vlan_id(const char *unit, const char *filename, unsigned line,
> + const char *section, unsigned section_line, const char *lvalue,
> + int ltype, const char *rvalue, void *data, void *userdata);
> +
> /* DHCP support */
>
> const char* dhcp_support_to_string(DHCPSupport i) _const_;
> diff --git a/src/systemd/sd-rtnl.h b/src/systemd/sd-rtnl.h
> index b05f83c..b8836e2 100644
> --- a/src/systemd/sd-rtnl.h
> +++ b/src/systemd/sd-rtnl.h
> @@ -109,8 +109,12 @@ int sd_rtnl_message_route_get_family(sd_rtnl_message *m, int *family);
> int sd_rtnl_message_route_get_dst_prefixlen(sd_rtnl_message *m, unsigned char *dst_len);
> int sd_rtnl_message_route_get_src_prefixlen(sd_rtnl_message *m, unsigned char *src_len);
>
> +int sd_rtnl_message_neigh_set_flags(sd_rtnl_message *m, uint8_t flags);
> +int sd_rtnl_message_neigh_set_state(sd_rtnl_message *m, uint16_t state);
> int sd_rtnl_message_neigh_get_family(sd_rtnl_message *m, int *family);
> int sd_rtnl_message_neigh_get_ifindex(sd_rtnl_message *m, int *family);
> +int sd_rtnl_message_neigh_get_state(sd_rtnl_message *m, uint16_t *state);
> +int sd_rtnl_message_neigh_get_flags(sd_rtnl_message *m, uint8_t *flags);
>
> int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data);
> int sd_rtnl_message_append_u8(sd_rtnl_message *m, unsigned short type, uint8_t data);
> --
> 1.9.3
>
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