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-rw-r--r--src/libsystemd/sd-netlink/netlink-slot.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/src/libsystemd/sd-netlink/netlink-slot.c b/src/libsystemd/sd-netlink/netlink-slot.c
new file mode 100644
index 0000000..fa951bf
--- /dev/null
+++ b/src/libsystemd/sd-netlink/netlink-slot.c
@@ -0,0 +1,202 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#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(const 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(const 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(const 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);
+}