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 **rqueue_partial;
72 unsigned rqueue_partial_size;
73 size_t rqueue_partial_allocated;
75 sd_rtnl_message **wqueue;
77 size_t wqueue_allocated;
79 struct nlmsghdr *rbuffer;
80 size_t rbuffer_allocated;
86 struct Prioq *reply_callbacks_prioq;
87 Hashmap *reply_callbacks;
89 LIST_HEAD(struct match_callback, match_callbacks);
93 sd_event_source *io_event_source;
94 sd_event_source *time_event_source;
95 sd_event_source *exit_event_source;
99 struct sd_rtnl_message {
104 struct nlmsghdr *hdr;
105 const struct NLTypeSystem *(container_type_system[RTNL_CONTAINER_DEPTH]); /* the type of the container and all its parents */
106 size_t container_offsets[RTNL_CONTAINER_DEPTH]; /* offset from hdr to each container's start */
107 unsigned n_containers; /* number of containers */
108 size_t next_rta_offset; /* offset from hdr to next rta */
109 size_t *rta_offset_tb[RTNL_CONTAINER_DEPTH];
110 unsigned short rta_tb_size[RTNL_CONTAINER_DEPTH];
113 sd_rtnl_message *next; /* next in a chain of multi-part messages */
116 int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type);
118 int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m);
119 int socket_read_message(sd_rtnl *nl);
121 int rtnl_rqueue_make_room(sd_rtnl *rtnl);
122 int rtnl_rqueue_partial_make_room(sd_rtnl *rtnl);
124 int rtnl_message_read_internal(sd_rtnl_message *m, unsigned short type, void **data);
125 int rtnl_message_parse(sd_rtnl_message *m,
126 size_t **rta_offset_tb,
127 unsigned short *rta_tb_size,
130 unsigned int rt_len);
132 /* Make sure callbacks don't destroy the rtnl connection */
133 #define RTNL_DONT_DESTROY(rtnl) \
134 _cleanup_rtnl_unref_ _unused_ sd_rtnl *_dont_destroy_##rtnl = sd_rtnl_ref(rtnl)