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Systemd/src/network/networkd-address.c

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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 Tom Gundersen <teg@jklm.no>
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 <net/if.h>
#include "alloc-util.h"
#include "conf-parser.h"
#include "firewall-util.h"
#include "netlink-util.h"
#include "networkd-address.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "set.h"
#include "socket-util.h"
#include "string-util.h"
#include "utf8.h"
#include "util.h"
#define ADDRESSES_PER_LINK_MAX 2048U
#define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
int address_new(Address **ret) {
_cleanup_address_free_ Address *address = NULL;
address = new0(Address, 1);
if (!address)
return -ENOMEM;
address->family = AF_UNSPEC;
address->scope = RT_SCOPE_UNIVERSE;
address->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
address->cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME;
*ret = TAKE_PTR(address);
return 0;
}
int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) {
_cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
_cleanup_address_free_ Address *address = NULL;
int r;
assert(network);
assert(ret);
assert(!!filename == (section_line > 0));
if (filename) {
r = network_config_section_new(filename, section_line, &n);
if (r < 0)
return r;
address = hashmap_get(network->addresses_by_section, n);
if (address) {
*ret = TAKE_PTR(address);
return 0;
}
}
if (network->n_static_addresses >= STATIC_ADDRESSES_PER_NETWORK_MAX)
return -E2BIG;
r = address_new(&address);
if (r < 0)
return r;
if (filename) {
address->section = TAKE_PTR(n);
r = hashmap_put(network->addresses_by_section, address->section, address);
if (r < 0)
return r;
}
address->network = network;
LIST_APPEND(addresses, network->static_addresses, address);
network->n_static_addresses++;
*ret = TAKE_PTR(address);
return 0;
}
void address_free(Address *address) {
if (!address)
return;
if (address->network) {
LIST_REMOVE(addresses, address->network->static_addresses, address);
assert(address->network->n_static_addresses > 0);
address->network->n_static_addresses--;
if (address->section) {
hashmap_remove(address->network->addresses_by_section, address->section);
network_config_section_free(address->section);
}
}
if (address->link) {
set_remove(address->link->addresses, address);
set_remove(address->link->addresses_foreign, address);
if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
}
free(address);
}
static void address_hash_func(const void *b, struct siphash *state) {
const Address *a = b;
assert(a);
siphash24_compress(&a->family, sizeof(a->family), state);
switch (a->family) {
case AF_INET:
siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state);
/* peer prefix */
if (a->prefixlen != 0) {
uint32_t prefix;
if (a->in_addr_peer.in.s_addr != 0)
prefix = be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen);
else
prefix = be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
siphash24_compress(&prefix, sizeof(prefix), state);
}
_fallthrough_;
case AF_INET6:
/* local address */
siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state);
break;
default:
/* treat any other address family as AF_UNSPEC */
break;
}
}
static int address_compare_func(const void *c1, const void *c2) {
const Address *a1 = c1, *a2 = c2;
if (a1->family < a2->family)
return -1;
if (a1->family > a2->family)
return 1;
switch (a1->family) {
/* use the same notion of equality as the kernel does */
case AF_INET:
if (a1->prefixlen < a2->prefixlen)
return -1;
if (a1->prefixlen > a2->prefixlen)
return 1;
/* compare the peer prefixes */
if (a1->prefixlen != 0) {
/* make sure we don't try to shift by 32.
* See ISO/IEC 9899:TC3 § 6.5.7.3. */
uint32_t b1, b2;
if (a1->in_addr_peer.in.s_addr != 0)
b1 = be32toh(a1->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
else
b1 = be32toh(a1->in_addr.in.s_addr) >> (32 - a1->prefixlen);
if (a2->in_addr_peer.in.s_addr != 0)
b2 = be32toh(a2->in_addr_peer.in.s_addr) >> (32 - a1->prefixlen);
else
b2 = be32toh(a2->in_addr.in.s_addr) >> (32 - a1->prefixlen);
if (b1 < b2)
return -1;
if (b1 > b2)
return 1;
}
_fallthrough_;
case AF_INET6:
return memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family));
default:
/* treat any other address family as AF_UNSPEC */
return 0;
}
}
static const struct hash_ops address_hash_ops = {
.hash = address_hash_func,
.compare = address_compare_func
};
bool address_equal(Address *a1, Address *a2) {
if (a1 == a2)
return true;
if (!a1 || !a2)
return false;
return address_compare_func(a1, a2) == 0;
}
static int address_establish(Address *address, Link *link) {
bool masq;
int r;
assert(address);
assert(link);
masq = link->network &&
link->network->ip_masquerade &&
address->family == AF_INET &&
address->scope < RT_SCOPE_LINK;
/* Add firewall entry if this is requested */
if (address->ip_masquerade_done != masq) {
union in_addr_union masked = address->in_addr;
in_addr_mask(address->family, &masked, address->prefixlen);
r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
if (r < 0)
log_link_warning_errno(link, r, "Could not enable IP masquerading: %m");
address->ip_masquerade_done = masq;
}
return 0;
}
static int address_add_internal(Link *link, Set **addresses,
int family,
const union in_addr_union *in_addr,
unsigned char prefixlen,
Address **ret) {
_cleanup_address_free_ Address *address = NULL;
int r;
assert(link);
assert(addresses);
assert(in_addr);
r = address_new(&address);
if (r < 0)
return r;
address->family = family;
address->in_addr = *in_addr;
address->prefixlen = prefixlen;
/* Consider address tentative until we get the real flags from the kernel */
address->flags = IFA_F_TENTATIVE;
r = set_ensure_allocated(addresses, &address_hash_ops);
if (r < 0)
return r;
r = set_put(*addresses, address);
if (r < 0)
return r;
address->link = link;
if (ret)
*ret = address;
address = NULL;
return 0;
}
int address_add_foreign(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
return address_add_internal(link, &link->addresses_foreign, family, in_addr, prefixlen, ret);
}
int address_add(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
Address *address;
int r;
r = address_get(link, family, in_addr, prefixlen, &address);
if (r == -ENOENT) {
/* Address does not exist, create a new one */
r = address_add_internal(link, &link->addresses, family, in_addr, prefixlen, &address);
if (r < 0)
return r;
} else if (r == 0) {
/* Take over a foreign address */
r = set_ensure_allocated(&link->addresses, &address_hash_ops);
if (r < 0)
return r;
r = set_put(link->addresses, address);
if (r < 0)
return r;
set_remove(link->addresses_foreign, address);
} else if (r == 1) {
/* Already exists, do nothing */
;
} else
return r;
if (ret)
*ret = address;
return 0;
}
static int address_release(Address *address) {
int r;
assert(address);
assert(address->link);
/* Remove masquerading firewall entry if it was added */
if (address->ip_masquerade_done) {
union in_addr_union masked = address->in_addr;
in_addr_mask(address->family, &masked, address->prefixlen);
r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
if (r < 0)
log_link_warning_errno(address->link, r, "Failed to disable IP masquerading: %m");
address->ip_masquerade_done = false;
}
return 0;
}
int address_update(
Address *address,
unsigned char flags,
unsigned char scope,
const struct ifa_cacheinfo *cinfo) {
bool ready;
int r;
assert(address);
assert(cinfo);
assert_return(address->link, 1);
if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
ready = address_is_ready(address);
address->flags = flags;
address->scope = scope;
address->cinfo = *cinfo;
link_update_operstate(address->link);
if (!ready && address_is_ready(address)) {
link_check_ready(address->link);
if (address->family == AF_INET6 &&
in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 &&
in_addr_is_null(AF_INET6, (const union in_addr_union*) &address->link->ipv6ll_address) > 0) {
r = link_ipv6ll_gained(address->link, &address->in_addr.in6);
if (r < 0)
return r;
}
}
return 0;
}
int address_drop(Address *address) {
Link *link;
bool ready;
assert(address);
ready = address_is_ready(address);
link = address->link;
address_release(address);
address_free(address);
link_update_operstate(link);
if (link && !ready)
link_check_ready(link);
return 0;
}
int address_get(Link *link,
int family,
const union in_addr_union *in_addr,
unsigned char prefixlen,
Address **ret) {
Address address, *existing;
assert(link);
assert(in_addr);
address = (Address) {
.family = family,
.in_addr = *in_addr,
.prefixlen = prefixlen,
};
existing = set_get(link->addresses, &address);
if (existing) {
if (ret)
*ret = existing;
return 1;
}
existing = set_get(link->addresses_foreign, &address);
if (existing) {
if (ret)
*ret = existing;
return 0;
}
return -ENOENT;
}
int address_remove(
Address *address,
Link *link,
sd_netlink_message_handler_t callback) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
int r;
assert(address);
assert(IN_SET(address->family, AF_INET, AF_INET6));
assert(link);
assert(link->ifindex > 0);
assert(link->manager);
assert(link->manager->rtnl);
r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
link->ifindex, address->family);
if (r < 0)
return log_error_errno(r, "Could not allocate RTM_DELADDR message: %m");
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0)
return log_error_errno(r, "Could not set prefixlen: %m");
if (address->family == AF_INET)
r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
else if (address->family == AF_INET6)
r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
if (r < 0)
return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0)
return log_error_errno(r, "Could not send rtnetlink message: %m");
link_ref(link);
return 0;
}
static int address_acquire(Link *link, Address *original, Address **ret) {
union in_addr_union in_addr = {};
struct in_addr broadcast = {};
_cleanup_address_free_ Address *na = NULL;
int r;
assert(link);
assert(original);
assert(ret);
/* Something useful was configured? just use it */
if (in_addr_is_null(original->family, &original->in_addr) <= 0)
return 0;
/* The address is configured to be 0.0.0.0 or [::] by the user?
* Then let's acquire something more useful from the pool. */
r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr);
if (r < 0)
return log_link_error_errno(link, r, "Failed to acquire address from pool: %m");
if (r == 0) {
log_link_error(link, "Couldn't find free address for interface, all taken.");
return -EBUSY;
}
if (original->family == AF_INET) {
/* Pick first address in range for ourselves ... */
in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
/* .. and use last as broadcast address */
if (original->prefixlen > 30)
broadcast.s_addr = 0;
else
broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen);
} else if (original->family == AF_INET6)
in_addr.in6.s6_addr[15] |= 1;
r = address_new(&na);
if (r < 0)
return r;
na->family = original->family;
na->prefixlen = original->prefixlen;
na->scope = original->scope;
na->cinfo = original->cinfo;
if (original->label) {
na->label = strdup(original->label);
if (!na->label)
return -ENOMEM;
}
na->broadcast = broadcast;
na->in_addr = in_addr;
LIST_PREPEND(addresses, link->pool_addresses, na);
*ret = TAKE_PTR(na);
return 0;
}
int address_configure(
Address *address,
Link *link,
sd_netlink_message_handler_t callback,
bool update) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
int r;
assert(address);
assert(IN_SET(address->family, AF_INET, AF_INET6));
assert(link);
assert(link->ifindex > 0);
assert(link->manager);
assert(link->manager->rtnl);
/* If this is a new address, then refuse adding more than the limit */
if (address_get(link, address->family, &address->in_addr, address->prefixlen, NULL) <= 0 &&
set_size(link->addresses) >= ADDRESSES_PER_LINK_MAX)
return -E2BIG;
r = address_acquire(link, address, &address);
if (r < 0)
return r;
if (update)
r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req,
link->ifindex, address->family);
else
r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
link->ifindex, address->family);
if (r < 0)
return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0)
return log_error_errno(r, "Could not set prefixlen: %m");
address->flags |= IFA_F_PERMANENT;
if (address->home_address)
address->flags |= IFA_F_HOMEADDRESS;
if (address->duplicate_address_detection)
address->flags |= IFA_F_NODAD;
if (address->manage_temporary_address)
address->flags |= IFA_F_MANAGETEMPADDR;
if (address->prefix_route)
address->flags |= IFA_F_NOPREFIXROUTE;
if (address->autojoin)
address->flags |= IFA_F_MCAUTOJOIN;
r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff));
if (r < 0)
return log_error_errno(r, "Could not set flags: %m");
if (address->flags & ~0xff) {
r = sd_netlink_message_append_u32(req, IFA_FLAGS, address->flags);
if (r < 0)
return log_error_errno(r, "Could not set extended flags: %m");
}
r = sd_rtnl_message_addr_set_scope(req, address->scope);
if (r < 0)
return log_error_errno(r, "Could not set scope: %m");
if (address->family == AF_INET)
r = sd_netlink_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
else if (address->family == AF_INET6)
r = sd_netlink_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
if (r < 0)
return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
if (!in_addr_is_null(address->family, &address->in_addr_peer)) {
if (address->family == AF_INET)
r = sd_netlink_message_append_in_addr(req, IFA_ADDRESS, &address->in_addr_peer.in);
else if (address->family == AF_INET6)
r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &address->in_addr_peer.in6);
if (r < 0)
return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
} else {
if (address->family == AF_INET) {
if (address->prefixlen <= 30) {
r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
if (r < 0)
return log_error_errno(r, "Could not append IFA_BROADCAST attribute: %m");
}
}
}
if (address->label) {
r = sd_netlink_message_append_string(req, IFA_LABEL, address->label);
if (r < 0)
return log_error_errno(r, "Could not append IFA_LABEL attribute: %m");
}
r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO,
&address->cinfo);
if (r < 0)
return log_error_errno(r, "Could not append IFA_CACHEINFO attribute: %m");
r = address_establish(address, link);
if (r < 0)
return r;
r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0) {
address_release(address);
return log_error_errno(r, "Could not send rtnetlink message: %m");
}
link_ref(link);
r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
if (r < 0) {
address_release(address);
return log_error_errno(r, "Could not add address: %m");
}
return 0;
}
int config_parse_broadcast(
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_address_free_ Address *n = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
if (n->family == AF_INET6) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
return 0;
}
r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Broadcast is invalid, ignoring assignment: %s", rvalue);
return 0;
}
n->family = AF_INET;
n = NULL;
return 0;
}
int config_parse_address(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_address_free_ Address *n = NULL;
const char *address, *e;
union in_addr_union buffer;
int r, f;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
if (streq(section, "Network")) {
/* we are not in an Address section, so treat
* this as the special '0' section */
r = address_new_static(network, NULL, 0, &n);
} else
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
/* Address=address/prefixlen */
/* prefixlen */
e = strchr(rvalue, '/');
if (e) {
unsigned i;
r = safe_atou(e + 1, &i);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length is invalid, ignoring assignment: %s", e + 1);
return 0;
}
n->prefixlen = (unsigned char) i;
address = strndupa(rvalue, e - rvalue);
} else
address = rvalue;
r = in_addr_from_string_auto(address, &f, &buffer);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Address is invalid, ignoring assignment: %s", address);
return 0;
}
if (!e && f == AF_INET) {
r = in4_addr_default_prefixlen(&buffer.in, &n->prefixlen);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Prefix length not specified, and a default one cannot be deduced for '%s', ignoring assignment", address);
return 0;
}
}
if (n->family != AF_UNSPEC && f != n->family) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Address is incompatible, ignoring assignment: %s", address);
return 0;
}
n->family = f;
if (streq(lvalue, "Address"))
n->in_addr = buffer;
else
n->in_addr_peer = buffer;
if (n->family == AF_INET && n->broadcast.s_addr == 0)
n->broadcast.s_addr = n->in_addr.in.s_addr | htonl(0xfffffffflu >> n->prefixlen);
n = NULL;
return 0;
}
int config_parse_label(
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) {
_cleanup_address_free_ Address *n = NULL;
Network *network = userdata;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
if (!address_label_valid(rvalue)) {
log_syntax(unit, LOG_ERR, filename, line, 0, "Interface label is too long or invalid, ignoring assignment: %s", rvalue);
return 0;
}
r = free_and_strdup(&n->label, rvalue);
if (r < 0)
return log_oom();
n = NULL;
return 0;
}
int config_parse_lifetime(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_address_free_ Address *n = NULL;
unsigned k;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
if (STR_IN_SET(rvalue, "forever", "infinity")) {
n->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
n = NULL;
return 0;
}
r = safe_atou(rvalue, &k);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PreferredLifetime, ignoring: %s", rvalue);
return 0;
}
if (k != 0)
log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid PreferredLifetime value, ignoring: %d", k);
else {
n->cinfo.ifa_prefered = k;
n = NULL;
}
return 0;
}
int config_parse_address_flags(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_address_free_ Address *n = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
r = parse_boolean(rvalue);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
return 0;
}
if (streq(lvalue, "HomeAddress"))
n->home_address = r;
else if (streq(lvalue, "DuplicateAddressDetection"))
n->duplicate_address_detection = r;
else if (streq(lvalue, "ManageTemporaryAddress"))
n->manage_temporary_address = r;
else if (streq(lvalue, "PrefixRoute"))
n->prefix_route = r;
else if (streq(lvalue, "AutoJoin"))
n->autojoin = r;
return 0;
}
int config_parse_address_scope(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_address_free_ Address *n = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r < 0)
return r;
if (streq(rvalue, "host"))
n->scope = RT_SCOPE_HOST;
else if (streq(rvalue, "link"))
n->scope = RT_SCOPE_LINK;
else if (streq(rvalue, "global"))
n->scope = RT_SCOPE_UNIVERSE;
else {
r = safe_atou8(rvalue , &n->scope);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse address scope \"%s\", ignoring assignment: %m", rvalue);
return 0;
}
}
n = NULL;
return 0;
}
bool address_is_ready(const Address *a) {
assert(a);
if (a->family == AF_INET6)
return !(a->flags & IFA_F_TENTATIVE);
else
return !(a->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED));
}
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