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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* nm-dhcp-dhcpcd.c - dhcpcd specific hooks for NetworkManager
*
* Copyright (C) 2008 Roy Marples
* Copyright (C) 2010 Dan Williams <dcbw@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "config.h"
#include <glib.h>
#include <glib/gi18n.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "nm-dhcp-dhcpcd.h"
#include "nm-dhcp-manager.h"
#include "nm-utils.h"
#include "nm-logging.h"
#include "NetworkManagerUtils.h"
#include "nm-dhcp-listener.h"
#include "nm-glib-compat.h"
G_DEFINE_TYPE (NMDhcpDhcpcd, nm_dhcp_dhcpcd, NM_TYPE_DHCP_CLIENT)
#define NM_DHCP_DHCPCD_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DHCP_DHCPCD, NMDhcpDhcpcdPrivate))
typedef struct {
char *pid_file;
} NMDhcpDhcpcdPrivate;
static const char *
nm_dhcp_dhcpcd_get_path (void)
{
const char *path = NULL;
if (WITH_DHCPCD)
path = nm_utils_find_helper ("dhcpcd", DHCPCD_PATH, NULL);
return path;
}
static gboolean
ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address)
{
NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client);
GPtrArray *argv = NULL;
pid_t pid = -1;
GError *error = NULL;
char *pid_contents = NULL, *binary_name, *cmd_str;
const char *iface, *dhcpcd_path, *hostname;
g_return_val_if_fail (priv->pid_file == NULL, FALSE);
iface = nm_dhcp_client_get_iface (client);
/* dhcpcd does not allow custom pidfiles; the pidfile is always
* RUNDIR "dhcpcd-<ifname>.pid".
*/
priv->pid_file = g_strdup_printf (RUNDIR "/dhcpcd-%s.pid", iface);
dhcpcd_path = nm_dhcp_dhcpcd_get_path ();
if (!dhcpcd_path) {
nm_log_warn (LOGD_DHCP4, "dhcpcd could not be found");
return FALSE;
}
/* Kill any existing dhcpcd from the pidfile */
binary_name = g_path_get_basename (dhcpcd_path);
nm_dhcp_client_stop_existing (priv->pid_file, binary_name);
g_free (binary_name);
argv = g_ptr_array_new ();
g_ptr_array_add (argv, (gpointer) dhcpcd_path);
g_ptr_array_add (argv, (gpointer) "-B"); /* Don't background on lease (disable fork()) */
g_ptr_array_add (argv, (gpointer) "-K"); /* Disable built-in carrier detection */
g_ptr_array_add (argv, (gpointer) "-L"); /* Disable built-in IPv4LL */
/* --noarp. Don't request or claim the address by ARP; this also disables IPv4LL. */
g_ptr_array_add (argv, (gpointer) "-A");
g_ptr_array_add (argv, (gpointer) "-G"); /* Let NM handle routing */
g_ptr_array_add (argv, (gpointer) "-c"); /* Set script file */
g_ptr_array_add (argv, (gpointer) nm_dhcp_helper_path);
#ifdef DHCPCD_SUPPORTS_IPV6
/* IPv4-only for now. NetworkManager knows better than dhcpcd when to
* run IPv6, and dhcpcd's automatic Router Solicitations cause problems
* with devices that don't expect them.
*/
g_ptr_array_add (argv, (gpointer) "-4");
#endif
hostname = nm_dhcp_client_get_hostname (client);
if (hostname) {
g_ptr_array_add (argv, (gpointer) "-h"); /* Send hostname to DHCP server */
g_ptr_array_add (argv, (gpointer) hostname );
}
g_ptr_array_add (argv, (gpointer) iface);
g_ptr_array_add (argv, NULL);
cmd_str = g_strjoinv (" ", (gchar **) argv->pdata);
nm_log_dbg (LOGD_DHCP4, "running: %s", cmd_str);
g_free (cmd_str);
if (g_spawn_async (NULL, (char **) argv->pdata, NULL,
G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL,
nm_utils_setpgid, NULL, &pid, &error)) {
g_assert (pid > 0);
nm_log_info (LOGD_DHCP4, "dhcpcd started with pid %d", pid);
nm_dhcp_client_watch_child (client, pid);
} else {
nm_log_warn (LOGD_DHCP4, "dhcpcd failed to start. error: '%s'", error->message);
g_error_free (error);
}
g_free (pid_contents);
g_ptr_array_free (argv, TRUE);
return pid > 0 ? TRUE : FALSE;
}
static gboolean
ip6_start (NMDhcpClient *client,
const char *dhcp_anycast_addr,
gboolean info_only,
NMSettingIP6ConfigPrivacy privacy,
const GByteArray *duid)
{
nm_log_warn (LOGD_DHCP6, "the dhcpcd backend does not support IPv6.");
return FALSE;
}
static void
stop (NMDhcpClient *client, gboolean release, const GByteArray *duid)
{
NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (client);
/* Chain up to parent */
NM_DHCP_CLIENT_CLASS (nm_dhcp_dhcpcd_parent_class)->stop (client, release, duid);
if (priv->pid_file) {
if (remove (priv->pid_file) == -1)
nm_log_dbg (LOGD_DHCP, "Could not remove dhcp pid file \"%s\": %d (%s)", priv->pid_file, errno, g_strerror (errno));
}
/* FIXME: implement release... */
}
/***************************************************/
static void
nm_dhcp_dhcpcd_init (NMDhcpDhcpcd *self)
{
g_signal_connect (nm_dhcp_listener_get (),
NM_DHCP_LISTENER_EVENT,
G_CALLBACK (nm_dhcp_client_handle_event),
self);
}
static void
dispose (GObject *object)
{
NMDhcpDhcpcdPrivate *priv = NM_DHCP_DHCPCD_GET_PRIVATE (object);
g_signal_handlers_disconnect_by_func (nm_dhcp_listener_get (),
G_CALLBACK (nm_dhcp_client_handle_event),
NM_DHCP_DHCPCD (object));
g_free (priv->pid_file);
G_OBJECT_CLASS (nm_dhcp_dhcpcd_parent_class)->dispose (object);
}
static void
nm_dhcp_dhcpcd_class_init (NMDhcpDhcpcdClass *dhcpcd_class)
{
NMDhcpClientClass *client_class = NM_DHCP_CLIENT_CLASS (dhcpcd_class);
GObjectClass *object_class = G_OBJECT_CLASS (dhcpcd_class);
g_type_class_add_private (dhcpcd_class, sizeof (NMDhcpDhcpcdPrivate));
/* virtual methods */
object_class->dispose = dispose;
client_class->ip4_start = ip4_start;
client_class->ip6_start = ip6_start;
client_class->stop = stop;
}
static void __attribute__((constructor))
register_dhcp_dhclient (void)
{
nm_g_type_init ();
_nm_dhcp_client_register (NM_TYPE_DHCP_DHCPCD,
"dhcpcd",
nm_dhcp_dhcpcd_get_path,
NULL);
}
|
