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-rw-r--r--src/network/networkd-fdb.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/src/network/networkd-fdb.c b/src/network/networkd-fdb.c
new file mode 100644
index 0000000000..9bb45e33d1
--- /dev/null
+++ b/src/network/networkd-fdb.c
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+/*-*- 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;
+}
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