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Systemd/src/network/networkd-address.c
Yu Watanabe ea121d8f25 network: update address infomation even if link is in failed or linger state 
As the link may be reconfigured later. If we do not update the address
information, then its setup state or operstate may not be updated
correctly.
2020-07-29 02:05:05 +09:00

1233 lines
40 KiB
C
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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <net/if.h>
#include "alloc-util.h"
#include "conf-parser.h"
#include "firewall-util.h"
#include "memory-util.h"
#include "missing_network.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 "strv.h"
#include "utf8.h"
#define ADDRESSES_PER_LINK_MAX 2048U
#define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
int generate_ipv6_eui_64_address(Link *link, struct in6_addr *ret) {
assert(link);
assert(ret);
/* see RFC4291 section 2.5.1 */
ret->s6_addr[8] = link->mac.ether_addr_octet[0];
ret->s6_addr[8] ^= 1 << 1;
ret->s6_addr[9] = link->mac.ether_addr_octet[1];
ret->s6_addr[10] = link->mac.ether_addr_octet[2];
ret->s6_addr[11] = 0xff;
ret->s6_addr[12] = 0xfe;
ret->s6_addr[13] = link->mac.ether_addr_octet[3];
ret->s6_addr[14] = link->mac.ether_addr_octet[4];
ret->s6_addr[15] = link->mac.ether_addr_octet[5];
return 0;
}
int address_new(Address **ret) {
_cleanup_(address_freep) Address *address = NULL;
address = new(Address, 1);
if (!address)
return -ENOMEM;
*address = (Address) {
.family = AF_UNSPEC,
.scope = RT_SCOPE_UNIVERSE,
.cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME,
.cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME,
.duplicate_address_detection = ADDRESS_FAMILY_IPV6,
.prefix_route = true,
};
*ret = TAKE_PTR(address);
return 0;
}
static int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) {
_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
_cleanup_(address_freep) 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;
address->network = network;
LIST_APPEND(addresses, network->static_addresses, address);
network->n_static_addresses++;
if (filename) {
address->section = TAKE_PTR(n);
r = hashmap_ensure_allocated(&network->addresses_by_section, &network_config_hash_ops);
if (r < 0)
return r;
r = hashmap_put(network->addresses_by_section, address->section, address);
if (r < 0)
return r;
}
*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);
}
if (address->link && !address->acd) {
set_remove(address->link->addresses, address);
set_remove(address->link->addresses_foreign, address);
set_remove(address->link->static_addresses, address);
if (address->link->dhcp_address == address)
address->link->dhcp_address = NULL;
if (address->link->dhcp_address_old == address)
address->link->dhcp_address_old = NULL;
set_remove(address->link->dhcp6_addresses, address);
set_remove(address->link->dhcp6_addresses_old, address);
set_remove(address->link->dhcp6_pd_addresses, address);
set_remove(address->link->dhcp6_pd_addresses_old, address);
set_remove(address->link->ndisc_addresses, address);
set_remove(address->link->ndisc_addresses_old, 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));
}
sd_ipv4acd_unref(address->acd);
network_config_section_free(address->section);
free(address->label);
free(address);
}
static uint32_t address_prefix(const Address *a) {
assert(a);
/* make sure we don't try to shift by 32.
* See ISO/IEC 9899:TC3 § 6.5.7.3. */
if (a->prefixlen == 0)
return 0;
if (a->in_addr_peer.in.s_addr != 0)
return be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen);
else
return be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
}
static void address_hash_func(const Address *a, struct siphash *state) {
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 */
uint32_t prefix = address_prefix(a);
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 Address *a1, const Address *a2) {
int r;
r = CMP(a1->family, a2->family);
if (r != 0)
return r;
switch (a1->family) {
/* use the same notion of equality as the kernel does */
case AF_INET:
r = CMP(a1->prefixlen, a2->prefixlen);
if (r != 0)
return r;
uint32_t prefix1 = address_prefix(a1);
uint32_t prefix2 = address_prefix(a2);
r = CMP(prefix1, prefix2);
if (r != 0)
return r;
_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;
}
}
DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(address_hash_ops, Address, address_hash_func, address_compare_func, address_free);
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)
return r;
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_freep) 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_put(addresses, &address_hash_ops, address);
if (r < 0)
return r;
if (r == 0)
return -EEXIST;
address->link = link;
if (ret)
*ret = address;
TAKE_PTR(address);
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_put(&link->addresses, &address_hash_ops, 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)
return r;
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(address->link);
assert(cinfo);
ready = address_is_ready(address);
address->flags = flags;
address->scope = scope;
address->cinfo = *cinfo;
if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 0;
link_update_operstate(address->link, true);
link_check_ready(address->link);
if (!ready && address_is_ready(address)) {
if (address->callback) {
r = address->callback(address);
if (r < 0)
return r;
}
if (address->family == AF_INET6 &&
in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 &&
IN6_IS_ADDR_UNSPECIFIED(&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;
int r;
assert(address);
ready = address_is_ready(address);
link = address->link;
r = address_release(address);
if (r < 0)
log_link_warning_errno(link, r, "Failed to disable IP masquerading, ignoring: %m");
address_free(address);
link_update_operstate(link, true);
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;
}
static bool address_exists_internal(Set *addresses, int family, const union in_addr_union *in_addr) {
Address *address;
Iterator i;
SET_FOREACH(address, addresses, i) {
if (address->family != family)
continue;
if (in_addr_equal(address->family, &address->in_addr, in_addr))
return true;
}
return false;
}
bool address_exists(Link *link, int family, const union in_addr_union *in_addr) {
assert(link);
assert(IN_SET(family, AF_INET, AF_INET6));
assert(in_addr);
if (address_exists_internal(link->addresses, family, in_addr))
return true;
if (address_exists_internal(link->addresses_foreign, family, in_addr))
return true;
return false;
}
static int address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
int r;
assert(m);
assert(link);
assert(link->ifname);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return 1;
r = sd_netlink_message_get_errno(m);
if (r < 0 && r != -EADDRNOTAVAIL)
log_link_message_warning_errno(link, m, r, "Could not drop address");
else
(void) manager_rtnl_process_address(rtnl, m, link->manager);
return 1;
}
int address_remove(
Address *address,
Link *link,
link_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);
if (DEBUG_LOGGING) {
_cleanup_free_ char *b = NULL;
(void) in_addr_to_string(address->family, &address->in_addr, &b);
log_link_debug(link, "Removing address %s", strna(b));
}
r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
link->ifindex, address->family);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate RTM_DELADDR message: %m");
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0)
return log_link_error_errno(link, r, "Could not set prefixlen: %m");
r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr);
if (r < 0)
return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m");
r = netlink_call_async(link->manager->rtnl, NULL, req,
callback ?: address_remove_handler,
link_netlink_destroy_callback, link);
if (r < 0)
return log_link_error_errno(link, 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 = IN_ADDR_NULL;
struct in_addr broadcast = {};
_cleanup_(address_freep) Address *na = NULL;
int r;
assert(link);
assert(original);
assert(ret);
/* Something useful was configured? just use it */
r = in_addr_is_null(original->family, &original->in_addr);
if (r <= 0)
return r;
/* 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 r;
if (r == 0)
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,
link_netlink_message_handler_t callback,
bool update,
Address **ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
Address *a;
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);
assert(callback);
/* 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 log_link_error_errno(link, SYNTHETIC_ERRNO(E2BIG),
"Too many addresses are configured, refusing: %m");
r = address_acquire(link, address, &address);
if (r < 0)
return log_link_error_errno(link, r, "Failed to acquire an address from pool: %m");
if (DEBUG_LOGGING) {
_cleanup_free_ char *str = NULL;
(void) in_addr_to_string(address->family, &address->in_addr, &str);
log_link_debug(link, "%s address: %s", update ? "Updating" : "Configuring", strna(str));
}
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_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m");
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0)
return log_link_error_errno(link, r, "Could not set prefixlen: %m");
address->flags |= IFA_F_PERMANENT;
if (address->home_address)
address->flags |= IFA_F_HOMEADDRESS;
if (!FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV6))
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_link_error_errno(link, 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_link_error_errno(link, r, "Could not set extended flags: %m");
}
r = sd_rtnl_message_addr_set_scope(req, address->scope);
if (r < 0)
return log_link_error_errno(link, r, "Could not set scope: %m");
r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr);
if (r < 0)
return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m");
if (in_addr_is_null(address->family, &address->in_addr_peer) == 0) {
r = netlink_message_append_in_addr_union(req, IFA_ADDRESS, address->family, &address->in_addr_peer);
if (r < 0)
return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m");
} else if (address->family == AF_INET && address->prefixlen <= 30) {
r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
if (r < 0)
return log_link_error_errno(link, 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_link_error_errno(link, 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_link_error_errno(link, r, "Could not append IFA_CACHEINFO attribute: %m");
r = address_establish(address, link);
if (r < 0)
log_link_warning_errno(link, r, "Could not enable IP masquerading, ignoring: %m");
r = netlink_call_async(link->manager->rtnl, NULL, req, callback, link_netlink_destroy_callback, link);
if (r < 0) {
address_release(address);
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
}
link_ref(link);
if (address->family == AF_INET6 && !in_addr_is_null(address->family, &address->in_addr_peer))
r = address_add(link, address->family, &address->in_addr_peer, address->prefixlen, &a);
else
r = address_add(link, address->family, &address->in_addr, address->prefixlen, &a);
if (r < 0) {
address_release(address);
return log_link_error_errno(link, r, "Could not add address: %m");
}
if (address->acd) {
assert(address->family == AF_INET);
if (DEBUG_LOGGING) {
_cleanup_free_ char *pretty = NULL;
(void) in_addr_to_string(address->family, &address->in_addr, &pretty);
log_link_debug(link, "Starting IPv4ACD client. Probing address %s", strna(pretty));
}
r = sd_ipv4acd_start(address->acd, true);
if (r < 0)
log_link_warning_errno(link, r, "Failed to start IPv4ACD client, ignoring: %m");
}
if (ret)
*ret = a;
return 1;
}
static void static_address_on_acd(sd_ipv4acd *acd, int event, void *userdata) {
_cleanup_free_ char *pretty = NULL;
Address *address;
Link *link;
int r;
assert(acd);
assert(userdata);
address = (Address *) userdata;
link = address->link;
(void) in_addr_to_string(address->family, &address->in_addr, &pretty);
switch (event) {
case SD_IPV4ACD_EVENT_STOP:
log_link_debug(link, "Stopping ACD client...");
return;
case SD_IPV4ACD_EVENT_BIND:
log_link_debug(link, "Successfully claimed address %s", strna(pretty));
link_check_ready(link);
break;
case SD_IPV4ACD_EVENT_CONFLICT:
log_link_warning(link, "DAD conflict. Dropping address %s", strna(pretty));
r = address_remove(address, link, NULL);
if (r < 0)
log_link_error_errno(link, r, "Failed to drop DAD conflicted address %s", strna(pretty));;
link_check_ready(link);
break;
default:
assert_not_reached("Invalid IPv4ACD event.");
}
sd_ipv4acd_stop(acd);
return;
}
int configure_ipv4_duplicate_address_detection(Link *link, Address *address) {
int r;
assert(link);
assert(address);
assert(address->family == AF_INET);
assert(!address->link && address->network);
address->link = link;
r = sd_ipv4acd_new(&address->acd);
if (r < 0)
return r;
r = sd_ipv4acd_attach_event(address->acd, NULL, 0);
if (r < 0)
return r;
r = sd_ipv4acd_set_ifindex(address->acd, link->ifindex);
if (r < 0)
return r;
r = sd_ipv4acd_set_mac(address->acd, &link->mac);
if (r < 0)
return r;
r = sd_ipv4acd_set_address(address->acd, &address->in_addr.in);
if (r < 0)
return r;
r = sd_ipv4acd_set_callback(address->acd, static_address_on_acd, address);
if (r < 0)
return r;
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_or_set_invalidp) 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 == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
if (n->family == AF_INET6) {
log_syntax(unit, LOG_WARNING, 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_WARNING, 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_or_set_invalidp) Address *n = NULL;
union in_addr_union buffer;
unsigned char prefixlen;
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 == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
/* Address=address/prefixlen */
r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_REFUSE, &f, &buffer, &prefixlen);
if (r == -ENOANO) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"An address '%s' is specified without prefix length. "
"The behavior of parsing addresses without prefix length will be changed in the future release. "
"Please specify prefix length explicitly.", rvalue);
r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_LEGACY, &f, &buffer, &prefixlen);
}
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid address '%s', ignoring assignment: %m", rvalue);
return 0;
}
if (n->family != AF_UNSPEC && f != n->family) {
log_syntax(unit, LOG_WARNING, filename, line, 0, "Address is incompatible, ignoring assignment: %s", rvalue);
return 0;
}
if (in_addr_is_null(f, &buffer)) {
/* Will use address from address pool. Note that for ipv6 case, prefix of the address
* pool is 8, but 40 bit is used by the global ID and 16 bit by the subnet ID. So,
* let's limit the prefix length to 64 or larger. See RFC4193. */
if ((f == AF_INET && prefixlen < 8) ||
(f == AF_INET6 && prefixlen < 64)) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Null address with invalid prefixlen='%u', ignoring assignment: %s",
prefixlen, rvalue);
return 0;
}
}
n->family = f;
n->prefixlen = prefixlen;
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->prefixlen <= 30)
n->broadcast.s_addr = n->in_addr.in.s_addr | htobe32(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_or_set_invalidp) 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 == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
if (!address_label_valid(rvalue)) {
log_syntax(unit, LOG_WARNING, 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_or_set_invalidp) Address *n = NULL;
uint32_t k;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
/* We accept only "forever", "infinity", empty, or "0". */
if (STR_IN_SET(rvalue, "forever", "infinity", ""))
k = CACHE_INFO_INFINITY_LIFE_TIME;
else if (streq(rvalue, "0"))
k = 0;
else {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid PreferredLifetime= value, ignoring: %s", rvalue);
return 0;
}
n->cinfo.ifa_prefered = k;
TAKE_PTR(n);
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_or_set_invalidp) 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 == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
r = parse_boolean(rvalue);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse %s=, ignoring: %s", lvalue, rvalue);
return 0;
}
if (streq(lvalue, "HomeAddress"))
n->home_address = r;
else if (streq(lvalue, "ManageTemporaryAddress"))
n->manage_temporary_address = r;
else if (streq(lvalue, "PrefixRoute"))
n->prefix_route = !r;
else if (streq(lvalue, "AddPrefixRoute"))
n->prefix_route = r;
else if (streq(lvalue, "AutoJoin"))
n->autojoin = r;
else
assert_not_reached("Invalid address flag type.");
n = NULL;
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_or_set_invalidp) 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 == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
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_WARNING, filename, line, r,
"Could not parse address scope \"%s\", ignoring assignment: %m", rvalue);
return 0;
}
}
n->scope_set = true;
n = NULL;
return 0;
}
int config_parse_duplicate_address_detection(
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_or_set_invalidp) Address *n = NULL;
AddressFamily a;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, filename, section_line, &n);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate new address, ignoring assignment: %m");
return 0;
}
r = parse_boolean(rvalue);
if (r >= 0) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"For historical reasons, %s=%s means %s=%s. "
"Please use 'both', 'ipv4', 'ipv6' or 'none' instead.",
lvalue, rvalue, lvalue, r ? "none" : "both");
n->duplicate_address_detection = r ? ADDRESS_FAMILY_NO : ADDRESS_FAMILY_YES;
n = NULL;
return 0;
}
a = duplicate_address_detection_address_family_from_string(rvalue);
if (a < 0) {
log_syntax(unit, LOG_WARNING, filename, line, SYNTHETIC_ERRNO(EINVAL),
"Failed to parse %s=, ignoring: %s", lvalue, rvalue);
return 0;
}
n->duplicate_address_detection = a;
n = NULL;
return 0;
}
bool address_is_ready(const Address *a) {
assert(a);
return !(a->flags & IFA_F_TENTATIVE);
}
int address_section_verify(Address *address) {
if (section_is_invalid(address->section))
return -EINVAL;
if (address->family == AF_UNSPEC) {
assert(address->section);
return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
"%s: Address section without Address= field configured. "
"Ignoring [Address] section from line %u.",
address->section->filename, address->section->line);
}
if (!address->scope_set && in_addr_is_localhost(address->family, &address->in_addr) > 0)
address->scope = RT_SCOPE_HOST;
return 0;
}
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