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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include "sd-netlink.h"
#include "alloc-util.h"
#include "netlink-internal.h"
#include "netlink-slot.h"
#include "string-util.h"
int netlink_slot_allocate(
sd_netlink *nl,
bool floating,
NetlinkSlotType type,
size_t extra,
void *userdata,
const char *description,
sd_netlink_slot **ret) {
_cleanup_free_ sd_netlink_slot *slot = NULL;
assert(nl);
assert(ret);
slot = malloc0(offsetof(sd_netlink_slot, reply_callback) + extra);
if (!slot)
return -ENOMEM;
slot->n_ref = 1;
slot->netlink = nl;
slot->userdata = userdata;
slot->type = type;
slot->floating = floating;
if (description) {
slot->description = strdup(description);
if (!slot->description)
return -ENOMEM;
}
if (!floating)
sd_netlink_ref(nl);
LIST_PREPEND(slots, nl->slots, slot);
*ret = TAKE_PTR(slot);
return 0;
}
void netlink_slot_disconnect(sd_netlink_slot *slot, bool unref) {
sd_netlink *nl;
assert(slot);
nl = slot->netlink;
if (!nl)
return;
switch (slot->type) {
case NETLINK_REPLY_CALLBACK:
(void) hashmap_remove(nl->reply_callbacks, &slot->reply_callback.serial);
if (slot->reply_callback.timeout != 0)
prioq_remove(nl->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
break;
case NETLINK_MATCH_CALLBACK:
LIST_REMOVE(match_callbacks, nl->match_callbacks, &slot->match_callback);
switch (slot->match_callback.type) {
case RTM_NEWLINK:
case RTM_DELLINK:
(void) socket_broadcast_group_unref(nl, RTNLGRP_LINK);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
(void) socket_broadcast_group_unref(nl, RTNLGRP_IPV4_IFADDR);
(void) socket_broadcast_group_unref(nl, RTNLGRP_IPV6_IFADDR);
break;
case RTM_NEWROUTE:
case RTM_DELROUTE:
(void) socket_broadcast_group_unref(nl, RTNLGRP_IPV4_ROUTE);
(void) socket_broadcast_group_unref(nl, RTNLGRP_IPV6_ROUTE);
break;
}
break;
default:
assert_not_reached("Wut? Unknown slot type?");
}
slot->type = _NETLINK_SLOT_INVALID;
slot->netlink = NULL;
LIST_REMOVE(slots, nl->slots, slot);
if (!slot->floating)
sd_netlink_unref(nl);
else if (unref)
sd_netlink_slot_unref(slot);
}
static sd_netlink_slot* netlink_slot_free(sd_netlink_slot *slot) {
assert(slot);
netlink_slot_disconnect(slot, false);
if (slot->destroy_callback)
slot->destroy_callback(slot->userdata);
free(slot->description);
return mfree(slot);
}
DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_netlink_slot, sd_netlink_slot, netlink_slot_free);
sd_netlink *sd_netlink_slot_get_netlink(sd_netlink_slot *slot) {
assert_return(slot, NULL);
return slot->netlink;
}
void *sd_netlink_slot_get_userdata(sd_netlink_slot *slot) {
assert_return(slot, NULL);
return slot->userdata;
}
void *sd_netlink_slot_set_userdata(sd_netlink_slot *slot, void *userdata) {
void *ret;
assert_return(slot, NULL);
ret = slot->userdata;
slot->userdata = userdata;
return ret;
}
int sd_netlink_slot_get_destroy_callback(sd_netlink_slot *slot, sd_netlink_destroy_t *callback) {
assert_return(slot, -EINVAL);
if (callback)
*callback = slot->destroy_callback;
return !!slot->destroy_callback;
}
int sd_netlink_slot_set_destroy_callback(sd_netlink_slot *slot, sd_netlink_destroy_t callback) {
assert_return(slot, -EINVAL);
slot->destroy_callback = callback;
return 0;
}
int sd_netlink_slot_get_floating(sd_netlink_slot *slot) {
assert_return(slot, -EINVAL);
return slot->floating;
}
int sd_netlink_slot_set_floating(sd_netlink_slot *slot, int b) {
assert_return(slot, -EINVAL);
if (slot->floating == !!b)
return 0;
if (!slot->netlink) /* Already disconnected */
return -ESTALE;
slot->floating = b;
if (b) {
sd_netlink_slot_ref(slot);
sd_netlink_unref(slot->netlink);
} else {
sd_netlink_ref(slot->netlink);
sd_netlink_slot_unref(slot);
}
return 1;
}
int sd_netlink_slot_get_description(sd_netlink_slot *slot, const char **description) {
assert_return(slot, -EINVAL);
if (description)
*description = slot->description;
return !!slot->description;
}
int sd_netlink_slot_set_description(sd_netlink_slot *slot, const char *description) {
assert_return(slot, -EINVAL);
return free_and_strdup(&slot->description, description);
}
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