1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright (C) 2014 Intel Corporation. All rights reserved.
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <net/ethernet.h>
25 #include "conf-parser.h"
27 #include "netlink-util.h"
30 #include "networkd-fdb.h"
32 /* create a new FDB entry or get an existing one. */
33 int fdb_entry_new_static(Network
*const network
,
34 const unsigned section
,
36 _cleanup_fdbentry_free_ FdbEntry
*fdb_entry
= NULL
;
37 struct ether_addr
*mac_addr
= NULL
;
41 /* search entry in hashmap first. */
43 fdb_entry
= hashmap_get(network
->fdb_entries_by_section
, UINT_TO_PTR(section
));
52 /* allocate space for MAC address. */
53 mac_addr
= new0(struct ether_addr
, 1);
57 /* allocate space for and FDB entry. */
58 fdb_entry
= new0(FdbEntry
, 1);
61 /* free previously allocated space for mac_addr. */
66 /* init FDB structure. */
67 fdb_entry
->network
= network
;
68 fdb_entry
->mac_addr
= mac_addr
;
70 LIST_PREPEND(static_fdb_entries
, network
->static_fdb_entries
, fdb_entry
);
73 fdb_entry
->section
= section
;
74 hashmap_put(network
->fdb_entries_by_section
,
75 UINT_TO_PTR(fdb_entry
->section
), fdb_entry
);
78 /* return allocated FDB structure. */
85 static int set_fdb_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
86 Link
*link
= userdata
;
91 r
= sd_netlink_message_get_errno(m
);
92 if (r
< 0 && r
!= -EEXIST
)
93 log_link_error_errno(link
, r
, "Could not add FDB entry: %m");
98 /* send a request to the kernel to add a FDB entry in its static MAC table. */
99 int fdb_entry_configure(Link
*const link
, FdbEntry
*const fdb_entry
) {
100 _cleanup_netlink_message_unref_ sd_netlink_message
*req
= NULL
;
105 assert(link
->manager
);
108 rtnl
= link
->manager
->rtnl
;
110 /* create new RTM message */
111 r
= sd_rtnl_message_new_neigh(rtnl
, &req
, RTM_NEWNEIGH
, link
->ifindex
, PF_BRIDGE
);
113 return rtnl_log_create_error(r
);
115 /* only NTF_SELF flag supported. */
116 r
= sd_rtnl_message_neigh_set_flags(req
, NTF_SELF
);
118 return rtnl_log_create_error(r
);
120 /* only NUD_PERMANENT state supported. */
121 r
= sd_rtnl_message_neigh_set_state(req
, NUD_NOARP
| NUD_PERMANENT
);
123 return rtnl_log_create_error(r
);
125 r
= sd_netlink_message_append_ether_addr(req
, NDA_LLADDR
, fdb_entry
->mac_addr
);
127 return rtnl_log_create_error(r
);
129 /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
130 if (0 != fdb_entry
->vlan_id
) {
131 r
= sd_netlink_message_append_u16(req
, NDA_VLAN
, fdb_entry
->vlan_id
);
133 return rtnl_log_create_error(r
);
136 /* send message to the kernel to update its internal static MAC table. */
137 r
= sd_netlink_call_async(rtnl
, req
, set_fdb_handler
, link
, 0, NULL
);
139 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
144 /* remove and FDB entry. */
145 void fdb_entry_free(FdbEntry
*fdb_entry
) {
149 if(fdb_entry
->network
) {
150 LIST_REMOVE(static_fdb_entries
, fdb_entry
->network
->static_fdb_entries
,
153 if (fdb_entry
->section
)
154 hashmap_remove(fdb_entry
->network
->fdb_entries_by_section
,
155 UINT_TO_PTR(fdb_entry
->section
));
158 free(fdb_entry
->mac_addr
);
163 /* parse the HW address from config files. */
164 int config_parse_fdb_hwaddr(
166 const char *filename
,
169 unsigned section_line
,
176 Network
*network
= userdata
;
177 _cleanup_fdbentry_free_ FdbEntry
*fdb_entry
= NULL
;
186 r
= fdb_entry_new_static(network
, section_line
, &fdb_entry
);
190 /* read in the MAC address for the FDB table. */
191 r
= sscanf(rvalue
, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
192 &fdb_entry
->mac_addr
->ether_addr_octet
[0],
193 &fdb_entry
->mac_addr
->ether_addr_octet
[1],
194 &fdb_entry
->mac_addr
->ether_addr_octet
[2],
195 &fdb_entry
->mac_addr
->ether_addr_octet
[3],
196 &fdb_entry
->mac_addr
->ether_addr_octet
[4],
197 &fdb_entry
->mac_addr
->ether_addr_octet
[5]);
199 if (ETHER_ADDR_LEN
!= r
) {
200 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
, "Not a valid MAC address, ignoring assignment: %s", rvalue
);
209 /* parse the VLAN Id from config files. */
210 int config_parse_fdb_vlan_id(
212 const char *filename
,
215 unsigned section_line
,
222 Network
*network
= userdata
;
223 _cleanup_fdbentry_free_ FdbEntry
*fdb_entry
= NULL
;
232 r
= fdb_entry_new_static(network
, section_line
, &fdb_entry
);
236 r
= config_parse_unsigned(unit
, filename
, line
, section
,
237 section_line
, lvalue
, ltype
,
238 rvalue
, &fdb_entry
->vlan_id
, userdata
);