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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "sd-network.h"
#include "alloc-util.h"
#include "format-util.h"
#include "hashmap.h"
#include "link.h"
#include "manager.h"
#include "string-util.h"
#include "strv.h"
int link_new(Manager *m, Link **ret, int ifindex, const char *ifname) {
_cleanup_(link_freep) Link *l = NULL;
_cleanup_free_ char *n = NULL;
int r;
assert(m);
assert(ifindex > 0);
assert(ifname);
n = strdup(ifname);
if (!n)
return -ENOMEM;
l = new(Link, 1);
if (!l)
return -ENOMEM;
*l = (Link) {
.manager = m,
.ifname = TAKE_PTR(n),
.ifindex = ifindex,
.required_operstate = LINK_OPERSTATE_RANGE_DEFAULT,
};
r = hashmap_ensure_put(&m->links_by_index, NULL, INT_TO_PTR(ifindex), l);
if (r < 0)
return r;
r = hashmap_ensure_put(&m->links_by_name, &string_hash_ops, l->ifname, l);
if (r < 0)
return r;
if (ret)
*ret = l;
TAKE_PTR(l);
return 0;
}
Link *link_free(Link *l) {
if (!l)
return NULL;
if (l->manager) {
hashmap_remove(l->manager->links_by_index, INT_TO_PTR(l->ifindex));
hashmap_remove(l->manager->links_by_name, l->ifname);
STRV_FOREACH(n, l->altnames)
hashmap_remove(l->manager->links_by_name, *n);
}
free(l->state);
free(l->ifname);
strv_free(l->altnames);
return mfree(l);
}
static int link_update_name(Link *l, sd_netlink_message *m) {
char ifname_from_index[IF_NAMESIZE];
const char *ifname;
int r;
assert(l);
assert(l->manager);
assert(m);
r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
if (r == -ENODATA)
/* Hmm? But ok. */
return 0;
if (r < 0)
return r;
if (streq(ifname, l->ifname))
return 0;
/* The kernel sometimes sends wrong ifname change. Let's confirm the received name. */
r = format_ifname(l->ifindex, ifname_from_index);
if (r < 0)
return r;
if (!streq(ifname, ifname_from_index)) {
log_link_debug(l, "New interface name '%s' received from the kernel does not correspond "
"with the name currently configured on the actual interface '%s'. Ignoring.",
ifname, ifname_from_index);
return 0;
}
hashmap_remove(l->manager->links_by_name, l->ifname);
r = free_and_strdup(&l->ifname, ifname);
if (r < 0)
return r;
r = hashmap_ensure_put(&l->manager->links_by_name, &string_hash_ops, l->ifname, l);
if (r < 0)
return r;
return 0;
}
static int link_update_altnames(Link *l, sd_netlink_message *m) {
_cleanup_strv_free_ char **altnames = NULL;
int r;
assert(l);
assert(l->manager);
assert(m);
r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
if (r == -ENODATA)
/* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
* interface has no alternative name. */
return 0;
if (r < 0)
return r;
if (strv_equal(altnames, l->altnames))
return 0;
STRV_FOREACH(n, l->altnames)
hashmap_remove(l->manager->links_by_name, *n);
strv_free_and_replace(l->altnames, altnames);
STRV_FOREACH(n, l->altnames) {
r = hashmap_ensure_put(&l->manager->links_by_name, &string_hash_ops, *n, l);
if (r < 0)
return r;
}
return 0;
}
int link_update_rtnl(Link *l, sd_netlink_message *m) {
int r;
assert(l);
assert(l->manager);
assert(m);
r = sd_rtnl_message_link_get_flags(m, &l->flags);
if (r < 0)
return r;
r = link_update_name(l, m);
if (r < 0)
return r;
r = link_update_altnames(l, m);
if (r < 0)
return r;
return 0;
}
int link_update_monitor(Link *l) {
_cleanup_free_ char *required_operstate = NULL, *required_family = NULL,
*ipv4_address_state = NULL, *ipv6_address_state = NULL, *state = NULL;
int r, ret = 0;
assert(l);
assert(l->ifname);
r = sd_network_link_get_required_for_online(l->ifindex);
if (r < 0 && r != -ENODATA)
ret = log_link_debug_errno(l, r, "Failed to determine whether the link is required for online or not, "
"assuming required: %m");
l->required_for_online = r != 0;
r = sd_network_link_get_required_operstate_for_online(l->ifindex, &required_operstate);
if (r < 0 && r != -ENODATA)
ret = log_link_debug_errno(l, r, "Failed to get required operational state, ignoring: %m");
if (isempty(required_operstate))
l->required_operstate = LINK_OPERSTATE_RANGE_DEFAULT;
else {
r = parse_operational_state_range(required_operstate, &l->required_operstate);
if (r < 0)
ret = log_link_debug_errno(l, SYNTHETIC_ERRNO(EINVAL),
"Failed to parse required operational state, ignoring: %m");
}
r = network_link_get_operational_state(l->ifindex, &l->operational_state);
if (r < 0)
ret = log_link_debug_errno(l, r, "Failed to get operational state, ignoring: %m");
r = sd_network_link_get_required_family_for_online(l->ifindex, &required_family);
if (r < 0 && r != -ENODATA)
ret = log_link_debug_errno(l, r, "Failed to get required address family, ignoring: %m");
if (isempty(required_family))
l->required_family = ADDRESS_FAMILY_NO;
else {
AddressFamily f;
f = link_required_address_family_from_string(required_family);
if (f < 0)
ret = log_link_debug_errno(l, f, "Failed to parse required address family, ignoring: %m");
else
l->required_family = f;
}
r = sd_network_link_get_ipv4_address_state(l->ifindex, &ipv4_address_state);
if (r < 0)
ret = log_link_debug_errno(l, r, "Failed to get IPv4 address state, ignoring: %m");
else {
LinkAddressState s;
s = link_address_state_from_string(ipv4_address_state);
if (s < 0)
ret = log_link_debug_errno(l, s, "Failed to parse IPv4 address state, ignoring: %m");
else
l->ipv4_address_state = s;
}
r = sd_network_link_get_ipv6_address_state(l->ifindex, &ipv6_address_state);
if (r < 0)
ret = log_link_debug_errno(l, r, "Failed to get IPv6 address state, ignoring: %m");
else {
LinkAddressState s;
s = link_address_state_from_string(ipv6_address_state);
if (s < 0)
ret = log_link_debug_errno(l, s, "Failed to parse IPv6 address state, ignoring: %m");
else
l->ipv6_address_state = s;
}
r = sd_network_link_get_setup_state(l->ifindex, &state);
if (r < 0)
ret = log_link_debug_errno(l, r, "Failed to get setup state, ignoring: %m");
else
free_and_replace(l->state, state);
return ret;
}
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