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/>.
24 #include <net/ethernet.h>
27 #include "networkd-netdev.h"
28 #include "networkd-link.h"
29 #include "network-internal.h"
30 #include "path-util.h"
31 #include "conf-files.h"
32 #include "conf-parser.h"
35 /* create a new FDB entry or get an existing one. */
36 int fdb_entry_new_static(Network *const network,
37 const unsigned section,
39 _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
40 struct ether_addr *mac_addr = NULL;
44 /* search entry in hashmap first. */
46 fdb_entry = hashmap_get(network->fdb_entries_by_section, UINT_TO_PTR(section));
55 /* allocate space for MAC address. */
56 mac_addr = new0(struct ether_addr, 1);
60 /* allocate space for and FDB entry. */
61 fdb_entry = new0(FdbEntry, 1);
64 /* free previously allocated space for mac_addr. */
69 /* init FDB structure. */
70 fdb_entry->network = network;
71 fdb_entry->mac_addr = mac_addr;
73 LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry);
76 fdb_entry->section = section;
77 hashmap_put(network->fdb_entries_by_section,
78 UINT_TO_PTR(fdb_entry->section), fdb_entry);
81 /* return allocated FDB structure. */
88 static int set_fdb_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
89 _cleanup_fdbentry_free_ FdbEntry *fdb_entry = userdata;
94 r = sd_rtnl_message_get_errno(m);
95 if ((r < 0) && (r != (-EEXIST)))
96 log_error("Could not add FDB entry for interface: %s error: %s",
97 fdb_entry->network->match_name, strerror(-r));
102 /* send a request to the kernel to add a FDB entry in its static MAC table. */
103 int fdb_entry_configure(sd_rtnl *const rtnl,
104 FdbEntry *const fdb_entry,
106 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
112 /* create new RTM message */
113 r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, ifindex, PF_BRIDGE);
115 return rtnl_log_create_error(r);
117 /* only NTF_SELF flag supported. */
118 r = sd_rtnl_message_neigh_set_flags(req, NTF_SELF);
120 return rtnl_log_create_error(r);
122 /* only NUD_PERMANENT state supported. */
123 r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT);
125 return rtnl_log_create_error(r);
127 r = sd_rtnl_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr);
129 return rtnl_log_create_error(r);
131 /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
132 if (0 != fdb_entry->vlan_id) {
133 r = sd_rtnl_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id);
135 return rtnl_log_create_error(r);
138 /* send message to the kernel to update its internal static MAC table. */
139 r = sd_rtnl_call_async(rtnl, req, set_fdb_handler, fdb_entry, 0, NULL);
141 log_error("Could not send rtnetlink message: %s", strerror(-r));
148 /* remove and FDB entry. */
149 void fdb_entry_free(FdbEntry *fdb_entry) {
153 if(fdb_entry->network) {
154 LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries,
157 if(fdb_entry->section)
158 hashmap_remove(fdb_entry->network->fdb_entries_by_section,
159 UINT_TO_PTR(fdb_entry->section));
162 free(fdb_entry->mac_addr);
167 /* parse the HW address from config files. */
168 int config_parse_fdb_hwaddr(const char *unit,
169 const char *filename,
172 unsigned section_line,
178 Network *network = userdata;
179 _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
188 r = fdb_entry_new_static(network, section_line, &fdb_entry);
190 log_error("Failed to allocate a new FDB entry: %s", strerror(-r));
194 /* read in the MAC address for the FDB table. */
195 r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
196 &fdb_entry->mac_addr->ether_addr_octet[0],
197 &fdb_entry->mac_addr->ether_addr_octet[1],
198 &fdb_entry->mac_addr->ether_addr_octet[2],
199 &fdb_entry->mac_addr->ether_addr_octet[3],
200 &fdb_entry->mac_addr->ether_addr_octet[4],
201 &fdb_entry->mac_addr->ether_addr_octet[5]);
203 if (ETHER_ADDR_LEN != r) {
204 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
205 "Not a valid MAC address, ignoring assignment: %s", rvalue);
214 /* parse the VLAN Id from config files. */
215 int config_parse_fdb_vlan_id(const char *unit,
216 const char *filename,
219 unsigned section_line,
225 Network *network = userdata;
226 _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL;
235 r = fdb_entry_new_static(network, section_line, &fdb_entry);
237 log_error("Failed to allocate a new FDB entry: %s", strerror(-r));
241 r = config_parse_unsigned(unit, filename, line, section,
242 section_line, lvalue, ltype,
243 rvalue, &fdb_entry->vlan_id, userdata);
245 log_error("Failed to parse the unsigned integer: %s", strerror(-r));