fcbf4cb727
If e.g., an [Address] section has an invalid setting, then previously assigned settings in the section is freed, and only later settings are stored. That may cause partially broken section stored in Network object. This makes if an invalid setting is found, then set 'invalid' flag instead of freeing it. And invalid sections are dropped later by network_verify().
261 lines
8 KiB
C
261 lines
8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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Copyright © 2014 Intel Corporation. All rights reserved.
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***/
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#include <net/ethernet.h>
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#include <net/if.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "netdev/bridge.h"
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#include "netlink-util.h"
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#include "networkd-fdb.h"
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#include "networkd-manager.h"
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#include "util.h"
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#include "vlan-util.h"
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#define STATIC_FDB_ENTRIES_PER_NETWORK_MAX 1024U
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/* create a new FDB entry or get an existing one. */
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static int fdb_entry_new_static(
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Network *network,
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const char *filename,
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unsigned section_line,
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FdbEntry **ret) {
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_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
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_cleanup_(fdb_entry_freep) FdbEntry *fdb_entry = NULL;
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_cleanup_free_ struct ether_addr *mac_addr = NULL;
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int r;
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assert(network);
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assert(ret);
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assert(!!filename == (section_line > 0));
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/* search entry in hashmap first. */
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if (filename) {
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r = network_config_section_new(filename, section_line, &n);
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if (r < 0)
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return r;
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fdb_entry = hashmap_get(network->fdb_entries_by_section, n);
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if (fdb_entry) {
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*ret = TAKE_PTR(fdb_entry);
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return 0;
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}
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}
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if (network->n_static_fdb_entries >= STATIC_FDB_ENTRIES_PER_NETWORK_MAX)
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return -E2BIG;
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/* allocate space for MAC address. */
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mac_addr = new0(struct ether_addr, 1);
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if (!mac_addr)
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return -ENOMEM;
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/* allocate space for and FDB entry. */
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fdb_entry = new(FdbEntry, 1);
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if (!fdb_entry)
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return -ENOMEM;
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/* init FDB structure. */
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*fdb_entry = (FdbEntry) {
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.network = network,
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.mac_addr = TAKE_PTR(mac_addr),
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};
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LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry);
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network->n_static_fdb_entries++;
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if (filename) {
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fdb_entry->section = TAKE_PTR(n);
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r = hashmap_ensure_allocated(&network->fdb_entries_by_section, &network_config_hash_ops);
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if (r < 0)
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return r;
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r = hashmap_put(network->fdb_entries_by_section, fdb_entry->section, fdb_entry);
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if (r < 0)
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return r;
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}
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/* return allocated FDB structure. */
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*ret = TAKE_PTR(fdb_entry);
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return 0;
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}
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static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(link);
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST)
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log_link_error_errno(link, r, "Could not add FDB entry: %m");
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return 1;
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}
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/* send a request to the kernel to add a FDB entry in its static MAC table. */
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int fdb_entry_configure(Link *link, FdbEntry *fdb_entry) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
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sd_netlink *rtnl;
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int r;
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uint8_t flags;
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Bridge *bridge;
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assert(link);
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assert(link->network);
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assert(link->manager);
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assert(fdb_entry);
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rtnl = link->manager->rtnl;
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bridge = BRIDGE(link->network->bridge);
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/* create new RTM message */
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r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE);
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if (r < 0)
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return rtnl_log_create_error(r);
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if (bridge)
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flags = NTF_MASTER;
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else
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flags = NTF_SELF;
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r = sd_rtnl_message_neigh_set_flags(req, flags);
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if (r < 0)
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return rtnl_log_create_error(r);
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/* only NUD_PERMANENT state supported. */
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r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT);
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if (r < 0)
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return rtnl_log_create_error(r);
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r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr);
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if (r < 0)
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return rtnl_log_create_error(r);
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/* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
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if (0 != fdb_entry->vlan_id) {
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r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id);
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if (r < 0)
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return rtnl_log_create_error(r);
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}
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/* send message to the kernel to update its internal static MAC table. */
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r = netlink_call_async(rtnl, NULL, req, set_fdb_handler,
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link_netlink_destroy_callback, link);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
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link_ref(link);
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return 0;
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}
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/* remove and FDB entry. */
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void fdb_entry_free(FdbEntry *fdb_entry) {
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if (!fdb_entry)
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return;
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if (fdb_entry->network) {
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LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries, fdb_entry);
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assert(fdb_entry->network->n_static_fdb_entries > 0);
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fdb_entry->network->n_static_fdb_entries--;
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if (fdb_entry->section)
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hashmap_remove(fdb_entry->network->fdb_entries_by_section, fdb_entry->section);
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}
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network_config_section_free(fdb_entry->section);
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free(fdb_entry->mac_addr);
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free(fdb_entry);
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}
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/* parse the HW address from config files. */
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int config_parse_fdb_hwaddr(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_(fdb_entry_free_or_set_invalidp) FdbEntry *fdb_entry = NULL;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = fdb_entry_new_static(network, filename, section_line, &fdb_entry);
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if (r < 0)
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return log_oom();
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/* read in the MAC address for the FDB table. */
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r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
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&fdb_entry->mac_addr->ether_addr_octet[0],
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&fdb_entry->mac_addr->ether_addr_octet[1],
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&fdb_entry->mac_addr->ether_addr_octet[2],
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&fdb_entry->mac_addr->ether_addr_octet[3],
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&fdb_entry->mac_addr->ether_addr_octet[4],
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&fdb_entry->mac_addr->ether_addr_octet[5]);
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if (r != ETHER_ADDR_LEN) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
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return 0;
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}
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fdb_entry = NULL;
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return 0;
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}
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/* parse the VLAN Id from config files. */
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int config_parse_fdb_vlan_id(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_(fdb_entry_free_or_set_invalidp) FdbEntry *fdb_entry = NULL;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = fdb_entry_new_static(network, filename, section_line, &fdb_entry);
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if (r < 0)
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return log_oom();
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r = config_parse_vlanid(unit, filename, line, section,
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section_line, lvalue, ltype,
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rvalue, &fdb_entry->vlan_id, userdata);
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if (r < 0)
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return r;
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fdb_entry = NULL;
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return 0;
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}
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