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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
commit55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch)
tree33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/libsystemd/sd-netlink/netlink-internal.h
parentInitial commit. (diff)
downloadsystemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz
systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libsystemd/sd-netlink/netlink-internal.h')
-rw-r--r--src/libsystemd/sd-netlink/netlink-internal.h212
1 files changed, 212 insertions, 0 deletions
diff --git a/src/libsystemd/sd-netlink/netlink-internal.h b/src/libsystemd/sd-netlink/netlink-internal.h
new file mode 100644
index 0000000..891d3e8
--- /dev/null
+++ b/src/libsystemd/sd-netlink/netlink-internal.h
@@ -0,0 +1,212 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <linux/netlink.h>
+
+#include "sd-netlink.h"
+
+#include "list.h"
+#include "netlink-types.h"
+#include "ordered-set.h"
+#include "prioq.h"
+#include "time-util.h"
+
+#define NETLINK_DEFAULT_TIMEOUT_USEC ((usec_t) (25 * USEC_PER_SEC))
+
+#define NETLINK_RQUEUE_MAX 64*1024
+
+#define NETLINK_CONTAINER_DEPTH 32
+
+struct reply_callback {
+ sd_netlink_message_handler_t callback;
+ usec_t timeout;
+ uint32_t serial;
+ unsigned prioq_idx;
+};
+
+struct match_callback {
+ sd_netlink_message_handler_t callback;
+ uint32_t *groups;
+ size_t n_groups;
+ uint16_t type;
+ uint8_t cmd; /* used by genl */
+
+ LIST_FIELDS(struct match_callback, match_callbacks);
+};
+
+typedef enum NetlinkSlotType {
+ NETLINK_REPLY_CALLBACK,
+ NETLINK_MATCH_CALLBACK,
+ _NETLINK_SLOT_INVALID = -EINVAL,
+} NetlinkSlotType;
+
+struct sd_netlink_slot {
+ unsigned n_ref;
+ NetlinkSlotType type:8;
+ bool floating;
+ sd_netlink *netlink;
+ void *userdata;
+ sd_netlink_destroy_t destroy_callback;
+
+ char *description;
+
+ LIST_FIELDS(sd_netlink_slot, slots);
+
+ union {
+ struct reply_callback reply_callback;
+ struct match_callback match_callback;
+ };
+};
+
+struct sd_netlink {
+ unsigned n_ref;
+
+ int fd;
+
+ union {
+ struct sockaddr sa;
+ struct sockaddr_nl nl;
+ } sockaddr;
+
+ int protocol;
+
+ Hashmap *broadcast_group_refs;
+ bool broadcast_group_dont_leave:1; /* until we can rely on 4.2 */
+
+ OrderedSet *rqueue;
+ Hashmap *rqueue_by_serial;
+ Hashmap *rqueue_partial_by_serial;
+
+ struct nlmsghdr *rbuffer;
+
+ bool processing:1;
+
+ uint32_t serial;
+
+ struct Prioq *reply_callbacks_prioq;
+ Hashmap *reply_callbacks;
+
+ LIST_HEAD(struct match_callback, match_callbacks);
+
+ LIST_HEAD(sd_netlink_slot, slots);
+
+ pid_t original_pid;
+
+ sd_event_source *io_event_source;
+ sd_event_source *time_event_source;
+ sd_event_source *exit_event_source;
+ sd_event *event;
+
+ Hashmap *genl_family_by_name;
+ Hashmap *genl_family_by_id;
+};
+
+struct netlink_attribute {
+ size_t offset; /* offset from hdr to attribute */
+ bool nested:1;
+ bool net_byteorder:1;
+};
+
+struct netlink_container {
+ const struct NLAPolicySet *policy_set; /* the policy set of the container */
+ size_t offset; /* offset from hdr to the start of the container */
+ struct netlink_attribute *attributes;
+ uint16_t max_attribute; /* the maximum attribute in container */
+};
+
+struct sd_netlink_message {
+ unsigned n_ref;
+
+ int protocol;
+
+ struct nlmsghdr *hdr;
+ struct netlink_container containers[NETLINK_CONTAINER_DEPTH];
+ unsigned n_containers; /* number of containers */
+ uint32_t multicast_group;
+ bool sealed:1;
+
+ sd_netlink_message *next; /* next in a chain of multi-part messages */
+};
+
+int message_new_empty(sd_netlink *nl, sd_netlink_message **ret);
+int message_new_full(
+ sd_netlink *nl,
+ uint16_t nlmsg_type,
+ const NLAPolicySet *policy_set,
+ size_t header_size,
+ sd_netlink_message **ret);
+int message_new(sd_netlink *nl, sd_netlink_message **ret, uint16_t type);
+int message_new_synthetic_error(sd_netlink *nl, int error, uint32_t serial, sd_netlink_message **ret);
+
+static inline uint32_t message_get_serial(sd_netlink_message *m) {
+ assert(m);
+ return ASSERT_PTR(m->hdr)->nlmsg_seq;
+}
+
+void message_seal(sd_netlink_message *m);
+
+int netlink_open_family(sd_netlink **ret, int family);
+bool netlink_pid_changed(sd_netlink *nl);
+
+int socket_bind(sd_netlink *nl);
+int socket_broadcast_group_ref(sd_netlink *nl, unsigned group);
+int socket_broadcast_group_unref(sd_netlink *nl, unsigned group);
+int socket_write_message(sd_netlink *nl, sd_netlink_message *m);
+int socket_read_message(sd_netlink *nl);
+
+int netlink_add_match_internal(
+ sd_netlink *nl,
+ sd_netlink_slot **ret_slot,
+ const uint32_t *groups,
+ size_t n_groups,
+ uint16_t type,
+ uint8_t cmd,
+ sd_netlink_message_handler_t callback,
+ sd_netlink_destroy_t destroy_callback,
+ void *userdata,
+ const char *description);
+
+/* Make sure callbacks don't destroy the netlink connection */
+#define NETLINK_DONT_DESTROY(nl) \
+ _cleanup_(sd_netlink_unrefp) _unused_ sd_netlink *_dont_destroy_##nl = sd_netlink_ref(nl)
+
+bool nfproto_is_valid(int nfproto);
+
+/* nfnl */
+/* TODO: to be exported later */
+int sd_nfnl_socket_open(sd_netlink **ret);
+int sd_nfnl_send_batch(
+ sd_netlink *nfnl,
+ sd_netlink_message **messages,
+ size_t msgcount,
+ uint32_t **ret_serials);
+int sd_nfnl_call_batch(
+ sd_netlink *nfnl,
+ sd_netlink_message **messages,
+ size_t n_messages,
+ uint64_t usec,
+ sd_netlink_message ***ret_messages);
+int sd_nfnl_message_new(
+ sd_netlink *nfnl,
+ sd_netlink_message **ret,
+ int nfproto,
+ uint16_t subsys,
+ uint16_t msg_type,
+ uint16_t flags);
+int sd_nfnl_nft_message_new_table(sd_netlink *nfnl, sd_netlink_message **ret,
+ int nfproto, const char *table);
+int sd_nfnl_nft_message_new_basechain(sd_netlink *nfnl, sd_netlink_message **ret,
+ int nfproto, const char *table, const char *chain,
+ const char *type, uint8_t hook, int prio);
+int sd_nfnl_nft_message_new_rule(sd_netlink *nfnl, sd_netlink_message **ret,
+ int nfproto, const char *table, const char *chain);
+int sd_nfnl_nft_message_new_set(sd_netlink *nfnl, sd_netlink_message **ret,
+ int nfproto, const char *table, const char *set_name,
+ uint32_t setid, uint32_t klen);
+int sd_nfnl_nft_message_new_setelems(sd_netlink *nfnl, sd_netlink_message **ret,
+ int add, int nfproto, const char *table, const char *set_name);
+int sd_nfnl_nft_message_append_setelem(sd_netlink_message *m,
+ uint32_t index,
+ const void *key, size_t key_len,
+ const void *data, size_t data_len,
+ uint32_t flags);