summaryrefslogtreecommitdiff
path: root/src/libsystemd/sd-netlink/netlink-internal.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/libsystemd/sd-netlink/netlink-internal.h')
-rw-r--r--src/libsystemd/sd-netlink/netlink-internal.h135
1 files changed, 135 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 0000000000..7290f4e875
--- /dev/null
+++ b/src/libsystemd/sd-netlink/netlink-internal.h
@@ -0,0 +1,135 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <linux/netlink.h>
+
+#include "refcnt.h"
+#include "prioq.h"
+#include "list.h"
+
+#include "sd-netlink.h"
+
+#include "netlink-types.h"
+
+#define RTNL_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
+
+#define RTNL_WQUEUE_MAX 1024
+#define RTNL_RQUEUE_MAX 64*1024
+
+#define RTNL_CONTAINER_DEPTH 32
+
+struct reply_callback {
+ sd_netlink_message_handler_t callback;
+ void *userdata;
+ usec_t timeout;
+ uint64_t serial;
+ unsigned prioq_idx;
+};
+
+struct match_callback {
+ sd_netlink_message_handler_t callback;
+ uint16_t type;
+ void *userdata;
+
+ LIST_FIELDS(struct match_callback, match_callbacks);
+};
+
+struct sd_netlink {
+ RefCount n_ref;
+
+ int fd;
+
+ union {
+ struct sockaddr sa;
+ struct sockaddr_nl nl;
+ } sockaddr;
+
+ sd_netlink_message **rqueue;
+ unsigned rqueue_size;
+ size_t rqueue_allocated;
+
+ sd_netlink_message **rqueue_partial;
+ unsigned rqueue_partial_size;
+ size_t rqueue_partial_allocated;
+
+ struct nlmsghdr *rbuffer;
+ size_t rbuffer_allocated;
+
+ bool processing:1;
+
+ uint32_t serial;
+
+ struct Prioq *reply_callbacks_prioq;
+ Hashmap *reply_callbacks;
+
+ LIST_HEAD(struct match_callback, match_callbacks);
+
+ 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;
+};
+
+struct sd_netlink_message {
+ RefCount n_ref;
+
+ sd_netlink *rtnl;
+
+ struct nlmsghdr *hdr;
+ const struct NLTypeSystem *(container_type_system[RTNL_CONTAINER_DEPTH]); /* the type of the container and all its parents */
+ size_t container_offsets[RTNL_CONTAINER_DEPTH]; /* offset from hdr to each container's start */
+ unsigned n_containers; /* number of containers */
+ size_t next_rta_offset; /* offset from hdr to next rta */
+ size_t *rta_offset_tb[RTNL_CONTAINER_DEPTH];
+ unsigned short rta_tb_size[RTNL_CONTAINER_DEPTH];
+ bool sealed:1;
+ bool broadcast:1;
+
+ sd_netlink_message *next; /* next in a chain of multi-part messages */
+};
+
+int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type);
+int message_new_empty(sd_netlink *rtnl, sd_netlink_message **ret);
+
+int socket_open(int family);
+int socket_bind(sd_netlink *nl);
+int socket_join_broadcast_group(sd_netlink *nl, unsigned group);
+int socket_write_message(sd_netlink *nl, sd_netlink_message *m);
+int socket_read_message(sd_netlink *nl);
+
+int rtnl_rqueue_make_room(sd_netlink *rtnl);
+int rtnl_rqueue_partial_make_room(sd_netlink *rtnl);
+
+int rtnl_message_read_internal(sd_netlink_message *m, unsigned short type, void **data);
+int rtnl_message_parse(sd_netlink_message *m,
+ size_t **rta_offset_tb,
+ unsigned short *rta_tb_size,
+ int max,
+ struct rtattr *rta,
+ unsigned int rt_len);
+
+/* Make sure callbacks don't destroy the rtnl connection */
+#define RTNL_DONT_DESTROY(rtnl) \
+ _cleanup_netlink_unref_ _unused_ sd_netlink *_dont_destroy_##rtnl = sd_netlink_ref(rtnl)