Line data Source code
1 : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2 :
3 : /***
4 : This file is part of systemd.
5 :
6 : Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
7 :
8 : systemd is free software; you can redistribute it and/or modify it
9 : under the terms of the GNU Lesser General Public License as published by
10 : the Free Software Foundation; either version 2.1 of the License, or
11 : (at your option) any later version.
12 :
13 : systemd is distributed in the hope that it will be useful, but
14 : WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : Lesser General Public License for more details.
17 :
18 : You should have received a copy of the GNU Lesser General Public License
19 : along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 : ***/
21 :
22 :
23 : #include "sd-netlink.h"
24 :
25 : #include "netlink-util.h"
26 : #include "netlink-internal.h"
27 :
28 0 : int rtnl_set_link_name(sd_netlink **rtnl, int ifindex, const char *name) {
29 0 : _cleanup_netlink_message_unref_ sd_netlink_message *message = NULL;
30 : int r;
31 :
32 0 : assert(rtnl);
33 0 : assert(ifindex > 0);
34 0 : assert(name);
35 :
36 0 : if (!*rtnl) {
37 0 : r = sd_netlink_open(rtnl);
38 0 : if (r < 0)
39 0 : return r;
40 : }
41 :
42 0 : r = sd_rtnl_message_new_link(*rtnl, &message, RTM_SETLINK, ifindex);
43 0 : if (r < 0)
44 0 : return r;
45 :
46 0 : r = sd_netlink_message_append_string(message, IFLA_IFNAME, name);
47 0 : if (r < 0)
48 0 : return r;
49 :
50 0 : r = sd_netlink_call(*rtnl, message, 0, NULL);
51 0 : if (r < 0)
52 0 : return r;
53 :
54 0 : return 0;
55 : }
56 :
57 0 : int rtnl_set_link_properties(sd_netlink **rtnl, int ifindex, const char *alias,
58 : const struct ether_addr *mac, unsigned mtu) {
59 0 : _cleanup_netlink_message_unref_ sd_netlink_message *message = NULL;
60 : int r;
61 :
62 0 : assert(rtnl);
63 0 : assert(ifindex > 0);
64 :
65 0 : if (!alias && !mac && mtu == 0)
66 0 : return 0;
67 :
68 0 : if (!*rtnl) {
69 0 : r = sd_netlink_open(rtnl);
70 0 : if (r < 0)
71 0 : return r;
72 : }
73 :
74 0 : r = sd_rtnl_message_new_link(*rtnl, &message, RTM_SETLINK, ifindex);
75 0 : if (r < 0)
76 0 : return r;
77 :
78 0 : if (alias) {
79 0 : r = sd_netlink_message_append_string(message, IFLA_IFALIAS, alias);
80 0 : if (r < 0)
81 0 : return r;
82 : }
83 :
84 0 : if (mac) {
85 0 : r = sd_netlink_message_append_ether_addr(message, IFLA_ADDRESS, mac);
86 0 : if (r < 0)
87 0 : return r;
88 : }
89 :
90 0 : if (mtu > 0) {
91 0 : r = sd_netlink_message_append_u32(message, IFLA_MTU, mtu);
92 0 : if (r < 0)
93 0 : return r;
94 : }
95 :
96 0 : r = sd_netlink_call(*rtnl, message, 0, NULL);
97 0 : if (r < 0)
98 0 : return r;
99 :
100 0 : return 0;
101 : }
102 :
103 1 : int rtnl_message_new_synthetic_error(int error, uint32_t serial, sd_netlink_message **ret) {
104 : struct nlmsgerr *err;
105 : int r;
106 :
107 1 : assert(error <= 0);
108 :
109 1 : r = message_new(NULL, ret, NLMSG_ERROR);
110 1 : if (r < 0)
111 0 : return r;
112 :
113 1 : (*ret)->hdr->nlmsg_seq = serial;
114 :
115 1 : err = NLMSG_DATA((*ret)->hdr);
116 :
117 1 : err->error = error;
118 :
119 1 : return 0;
120 : }
121 :
122 0 : bool rtnl_message_type_is_neigh(uint16_t type) {
123 0 : switch (type) {
124 : case RTM_NEWNEIGH:
125 : case RTM_GETNEIGH:
126 : case RTM_DELNEIGH:
127 0 : return true;
128 : default:
129 0 : return false;
130 : }
131 : }
132 :
133 30 : bool rtnl_message_type_is_route(uint16_t type) {
134 30 : switch (type) {
135 : case RTM_NEWROUTE:
136 : case RTM_GETROUTE:
137 : case RTM_DELROUTE:
138 30 : return true;
139 : default:
140 0 : return false;
141 : }
142 : }
143 :
144 33 : bool rtnl_message_type_is_link(uint16_t type) {
145 33 : switch (type) {
146 : case RTM_NEWLINK:
147 : case RTM_SETLINK:
148 : case RTM_GETLINK:
149 : case RTM_DELLINK:
150 33 : return true;
151 : default:
152 0 : return false;
153 : }
154 : }
155 :
156 51 : bool rtnl_message_type_is_addr(uint16_t type) {
157 51 : switch (type) {
158 : case RTM_NEWADDR:
159 : case RTM_GETADDR:
160 : case RTM_DELADDR:
161 51 : return true;
162 : default:
163 0 : return false;
164 : }
165 : }
166 :
167 0 : int rtnl_log_parse_error(int r) {
168 0 : return log_error_errno(r, "Failed to parse netlink message: %m");
169 : }
170 :
171 0 : int rtnl_log_create_error(int r) {
172 0 : return log_error_errno(r, "Failed to create netlink message: %m");
173 : }
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