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615 lines
19 KiB
C
615 lines
19 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <net/if.h>
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#include "networkd.h"
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#include "networkd-link.h"
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#include "utf8.h"
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#include "util.h"
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#include "conf-parser.h"
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#include "network-internal.h"
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static void address_init(Address *address) {
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assert(address);
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address->family = AF_UNSPEC;
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address->scope = RT_SCOPE_UNIVERSE;
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address->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
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address->cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME;
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}
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int address_new_static(Network *network, unsigned section, Address **ret) {
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_cleanup_address_free_ Address *address = NULL;
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if (section) {
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address = hashmap_get(network->addresses_by_section, UINT_TO_PTR(section));
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if (address) {
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*ret = address;
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address = NULL;
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return 0;
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}
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}
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address = new0(Address, 1);
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if (!address)
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return -ENOMEM;
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address_init(address);
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address->network = network;
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LIST_PREPEND(addresses, network->static_addresses, address);
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if (section) {
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address->section = section;
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hashmap_put(network->addresses_by_section,
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UINT_TO_PTR(address->section), address);
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}
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*ret = address;
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address = NULL;
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return 0;
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}
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int address_new_dynamic(Address **ret) {
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_cleanup_address_free_ Address *address = NULL;
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address = new0(Address, 1);
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if (!address)
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return -ENOMEM;
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address_init(address);
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*ret = address;
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address = NULL;
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return 0;
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}
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void address_free(Address *address) {
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if (!address)
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return;
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if (address->network) {
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LIST_REMOVE(addresses, address->network->static_addresses, address);
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if (address->section)
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hashmap_remove(address->network->addresses_by_section,
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UINT_TO_PTR(address->section));
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}
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free(address);
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}
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int address_drop(Address *address, Link *link,
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sd_rtnl_message_handler_t callback) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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assert(address);
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assert(address->family == AF_INET || address->family == AF_INET6);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
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link->ifindex, address->family);
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if (r < 0) {
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log_error("Could not allocate RTM_DELADDR message: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0) {
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log_error("Could not set prefixlen: %s", strerror(-r));
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return r;
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}
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
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if (r < 0) {
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log_error("Could not append IFA_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0) {
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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link_ref(link);
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return 0;
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}
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int address_update(Address *address, Link *link,
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sd_rtnl_message_handler_t callback) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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assert(address);
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assert(address->family == AF_INET || address->family == AF_INET6);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req,
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link->ifindex, address->family);
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if (r < 0) {
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log_error("Could not allocate RTM_NEWADDR message: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0) {
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log_error("Could not set prefixlen: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_flags(req, IFA_F_PERMANENT);
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if (r < 0) {
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log_error("Could not set flags: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_scope(req, address->scope);
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if (r < 0) {
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log_error("Could not set scope: %s", strerror(-r));
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return r;
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}
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
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if (r < 0) {
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log_error("Could not append IFA_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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if (address->family == AF_INET) {
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r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
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if (r < 0) {
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log_error("Could not append IFA_BROADCAST attribute: %s",
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strerror(-r));
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return r;
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}
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}
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if (address->label) {
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r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label);
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if (r < 0) {
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log_error("Could not append IFA_LABEL attribute: %s",
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strerror(-r));
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return r;
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}
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}
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r = sd_rtnl_message_append_cache_info(req, IFA_CACHEINFO, &address->cinfo);
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if (r < 0) {
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log_error("Could not append IFA_CACHEINFO attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0) {
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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link_ref(link);
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return 0;
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}
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static int address_acquire(Link *link, Address *original, Address **ret) {
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union in_addr_union in_addr = {};
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struct in_addr broadcast = {};
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_cleanup_address_free_ Address *na = NULL;
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int r;
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assert(link);
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assert(original);
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assert(ret);
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/* Something useful was configured? just use it */
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if (in_addr_is_null(original->family, &original->in_addr) <= 0)
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return 0;
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/* The address is configured to be 0.0.0.0 or [::] by the user?
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* Then let's acquire something more useful from the pool. */
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r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr);
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if (r < 0) {
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log_error_link(link, "Failed to acquire address from pool: %s", strerror(-r));
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return r;
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}
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if (r == 0) {
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log_error_link(link, "Couldn't find free address for interface, all taken.");
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return -EBUSY;
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}
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if (original->family == AF_INET) {
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/* Pick first address in range for ourselves ...*/
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in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
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/* .. and use last as broadcast address */
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broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen);
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} else if (original->family == AF_INET6)
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in_addr.in6.s6_addr[15] |= 1;
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r = address_new_dynamic(&na);
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if (r < 0)
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return r;
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na->family = original->family;
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na->prefixlen = original->prefixlen;
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na->scope = original->scope;
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na->cinfo = original->cinfo;
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if (original->label) {
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na->label = strdup(original->label);
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if (!na->label)
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return -ENOMEM;
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}
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na->broadcast = broadcast;
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na->in_addr = in_addr;
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LIST_PREPEND(addresses, link->pool_addresses, na);
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*ret = na;
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na = NULL;
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return 0;
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}
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int address_configure(Address *address, Link *link,
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sd_rtnl_message_handler_t callback) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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assert(address);
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assert(address->family == AF_INET || address->family == AF_INET6);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = address_acquire(link, address, &address);
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if (r < 0)
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return r;
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r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
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link->ifindex, address->family);
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if (r < 0) {
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log_error("Could not allocate RTM_NEWADDR message: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0) {
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log_error("Could not set prefixlen: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_flags(req, IFA_F_PERMANENT);
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if (r < 0) {
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log_error("Could not set flags: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_scope(req, address->scope);
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if (r < 0) {
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log_error("Could not set scope: %s", strerror(-r));
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return r;
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}
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
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if (r < 0) {
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log_error("Could not append IFA_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);
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if (r < 0) {
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log_error("Could not append IFA_ADDRESS attribute: %s",
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strerror(-r));
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return r;
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}
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} else {
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if (address->family == AF_INET) {
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r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
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if (r < 0) {
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log_error("Could not append IFA_BROADCAST attribute: %s",
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strerror(-r));
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return r;
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}
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}
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}
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if (address->label) {
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r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label);
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if (r < 0) {
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log_error("Could not append IFA_LABEL attribute: %s",
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strerror(-r));
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return r;
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}
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}
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r = sd_rtnl_message_append_cache_info(req, IFA_CACHEINFO,
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&address->cinfo);
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if (r < 0) {
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log_error("Could not append IFA_CACHEINFO attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0) {
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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link_ref(link);
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return 0;
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}
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int config_parse_broadcast(
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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_address_free_ Address *n = 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 = address_new_static(network, section_line, &n);
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if (r < 0)
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return r;
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if (n->family == AF_INET6) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
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return 0;
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}
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r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Broadcast is invalid, ignoring assignment: %s", rvalue);
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return 0;
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}
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n->family = AF_INET;
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n = NULL;
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return 0;
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}
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int config_parse_address(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_address_free_ Address *n = NULL;
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const char *address, *e;
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union in_addr_union buffer;
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int r, f;
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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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if (streq(section, "Network")) {
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/* we are not in an Address section, so treat
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* this as the special '0' section */
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section_line = 0;
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}
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r = address_new_static(network, section_line, &n);
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if (r < 0)
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return r;
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/* Address=address/prefixlen */
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/* prefixlen */
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e = strchr(rvalue, '/');
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if (e) {
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unsigned i;
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r = safe_atou(e + 1, &i);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Interface prefix length is invalid, ignoring assignment: %s", e + 1);
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return 0;
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}
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n->prefixlen = (unsigned char) i;
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address = strndupa(rvalue, e - rvalue);
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} else
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address = rvalue;
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r = in_addr_from_string_auto(address, &f, &buffer);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Address is invalid, ignoring assignment: %s", address);
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return 0;
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}
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if (n->family != AF_UNSPEC && f != n->family) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Address is incompatible, ignoring assignment: %s", address);
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return 0;
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}
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n->family = f;
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if (streq(lvalue, "Address"))
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n->in_addr = buffer;
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else
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n->in_addr_peer = buffer;
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if (n->family == AF_INET && n->broadcast.s_addr == 0)
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n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
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n = NULL;
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return 0;
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}
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int config_parse_label(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_address_free_ Address *n = NULL;
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char *label;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
label = strdup(rvalue);
|
|
if (!label)
|
|
return log_oom();
|
|
|
|
if (!ascii_is_valid(label) || strlen(label) >= IFNAMSIZ) {
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"Interface label is not ASCII clean or is too"
|
|
" long, ignoring assignment: %s", rvalue);
|
|
free(label);
|
|
return 0;
|
|
}
|
|
|
|
free(n->label);
|
|
if (*label)
|
|
n->label = label;
|
|
else {
|
|
free(label);
|
|
n->label = NULL;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool address_equal(Address *a1, Address *a2) {
|
|
/* same object */
|
|
if (a1 == a2)
|
|
return true;
|
|
|
|
/* one, but not both, is NULL */
|
|
if (!a1 || !a2)
|
|
return false;
|
|
|
|
if (a1->family != a2->family)
|
|
return false;
|
|
|
|
switch (a1->family) {
|
|
/* use the same notion of equality as the kernel does */
|
|
case AF_UNSPEC:
|
|
return true;
|
|
|
|
case AF_INET:
|
|
if (a1->prefixlen != a2->prefixlen)
|
|
return false;
|
|
else {
|
|
uint32_t b1, b2;
|
|
|
|
b1 = be32toh(a1->in_addr.in.s_addr);
|
|
b2 = be32toh(a2->in_addr.in.s_addr);
|
|
|
|
return (b1 >> (32 - a1->prefixlen)) == (b2 >> (32 - a1->prefixlen));
|
|
}
|
|
|
|
case AF_INET6:
|
|
{
|
|
uint64_t *b1, *b2;
|
|
|
|
b1 = (uint64_t*)&a1->in_addr.in6;
|
|
b2 = (uint64_t*)&a2->in_addr.in6;
|
|
|
|
return (((b1[0] ^ b2[0]) | (b1[1] ^ b2[1])) == 0UL);
|
|
}
|
|
default:
|
|
assert_not_reached("Invalid address family");
|
|
}
|
|
}
|