1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2013 Tom Gundersen <teg@jklm.no>
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <linux/netlink.h>
32 #include "rtnl-types.h"
34 #define RTNL_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC))
36 #define RTNL_WQUEUE_MAX 1024
37 #define RTNL_RQUEUE_MAX 64*1024
39 #define RTNL_CONTAINER_DEPTH 32
41 struct reply_callback {
42 sd_rtnl_message_handler_t callback;
49 struct match_callback {
50 sd_rtnl_message_handler_t callback;
54 LIST_FIELDS(struct match_callback, match_callbacks);
64 struct sockaddr_nl nl;
67 sd_rtnl_message **rqueue;
69 size_t rqueue_allocated;
71 sd_rtnl_message **wqueue;
73 size_t wqueue_allocated;
79 struct Prioq *reply_callbacks_prioq;
80 Hashmap *reply_callbacks;
82 LIST_HEAD(struct match_callback, match_callbacks);
86 sd_event_source *io_event_source;
87 sd_event_source *time_event_source;
88 sd_event_source *exit_event_source;
92 struct sd_rtnl_message {
98 const struct NLTypeSystem *(container_type_system[RTNL_CONTAINER_DEPTH]); /* the type of the container and all its parents */
99 size_t container_offsets[RTNL_CONTAINER_DEPTH]; /* offset from hdr to each container's start */
100 unsigned n_containers; /* number of containers */
101 size_t next_rta_offset; /* offset from hdr to next rta */
102 size_t *rta_offset_tb[RTNL_CONTAINER_DEPTH];
103 unsigned short rta_tb_size[RTNL_CONTAINER_DEPTH];
106 sd_rtnl_message *next; /* next in a chain of multi-part messages */
109 int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type);
111 int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m);
112 int socket_read_message(sd_rtnl *nl);
114 int rtnl_rqueue_make_room(sd_rtnl *rtnl);
116 int rtnl_message_read_internal(sd_rtnl_message *m, unsigned short type, void **data);
117 int rtnl_message_parse(sd_rtnl_message *m,
118 size_t **rta_offset_tb,
119 unsigned short *rta_tb_size,
122 unsigned int rt_len);
124 /* Make sure callbacks don't destroy the rtnl connection */
125 #define RTNL_DONT_DESTROY(rtnl) \
126 _cleanup_rtnl_unref_ _unused_ sd_rtnl *_dont_destroy_##rtnl = sd_rtnl_ref(rtnl)