summaryrefslogtreecommitdiff
path: root/src/network/networkd-veth.c
blob: 1a5d880ac256a85374d37d190f09144ee659424e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
    This file is part of systemd.

    Copyright 2014 Susant Sahani <susant@redhat.com>

    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 <netinet/ether.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <linux/veth.h>

#include "sd-rtnl.h"
#include "networkd.h"


static int netdev_fill_veth_rtnl_message(NetDev *netdev, sd_rtnl_message *m) {
        int r;

        assert(netdev);
        assert(m);

        r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_IFNAME, attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_LINKINFO attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
                                                 netdev_kind_to_string(netdev->kind));
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_INFO_DATA attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_open_container(m, VETH_INFO_PEER);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_IPTUN_LINK attribute: %s",
                                 strerror(-r));
                return r;
        }

        if(netdev->ifname_peer) {
                r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname_peer);
                if (r < 0) {
                        log_error("Failed to add netlink interface name: %s", strerror(-r));
                        return r;
                }
        }

        r = sd_rtnl_message_close_container(m);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_INFO_DATA attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_close_container(m);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_LINKINFO attribute: %s",
                                 strerror(-r));
                return r;
        }

        return r;
}

int netdev_create_veth(NetDev *netdev, sd_rtnl_message_handler_t callback) {
        _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
        int r;

        assert(netdev);
        assert(netdev->ifname);
        assert(netdev->manager);
        assert(netdev->manager->rtnl);

        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not allocate RTM_NEWLINK message: %s",
                                 strerror(-r));
                return r;
        }

        if(netdev->kind != NETDEV_KIND_VETH)
                return -ENOTSUP;

        r = netdev_fill_veth_rtnl_message(netdev, m);
        if(r < 0)
                return r;

        r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, netdev, 0, NULL);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not send rtnetlink message: %s", strerror(-r));
                return r;
        }

        log_debug_netdev(netdev, "Creating veth netdev: %s",
                         netdev_kind_to_string(netdev->kind));

        netdev->state = NETDEV_STATE_CREATING;

        return 0;
}