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
|
/* Find network interface names and index numbers. Hurd version.
Copyright (C) 2000-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <error.h>
#include <net/if.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/ioctl.h>
#include <hurd/pfinet.h>
/* Return the interface index corresponding to interface IFNAME.
On error, return 0. */
unsigned int
__if_nametoindex (const char *ifname)
{
struct ifreq ifr;
int fd = __opensock ();
if (fd < 0)
return 0;
strncpy (ifr.ifr_name, ifname, IFNAMSIZ);
if (__ioctl (fd, SIOCGIFINDEX, &ifr) < 0)
{
int saved_errno = errno;
__close (fd);
if (saved_errno == EINVAL || saved_errno == ENOTTY)
__set_errno (ENOSYS);
return 0;
}
__close (fd);
return ifr.ifr_ifindex;
}
libc_hidden_def (__if_nametoindex)
weak_alias (__if_nametoindex, if_nametoindex)
libc_hidden_weak (if_nametoindex)
/* Free the structure IFN returned by if_nameindex. */
void
__if_freenameindex (struct if_nameindex *ifn)
{
struct if_nameindex *ptr = ifn;
while (ptr->if_name || ptr->if_index)
{
free (ptr->if_name);
++ptr;
}
free (ifn);
}
libc_hidden_def (__if_freenameindex)
weak_alias (__if_freenameindex, if_freenameindex)
libc_hidden_weak (if_freenameindex)
/* Return an array of if_nameindex structures, one for each network
interface present, plus one indicating the end of the array. On
error, return NULL. */
struct if_nameindex *
__if_nameindex (void)
{
error_t err = 0;
char data[2048];
file_t server;
int fd = __opensock ();
struct ifconf ifc;
unsigned int nifs, i;
struct if_nameindex *idx = NULL;
ifc.ifc_buf = data;
if (fd < 0)
return NULL;
server = _hurd_socket_server (PF_INET, 0);
if (server == MACH_PORT_NULL)
nifs = 0;
else
{
size_t len = sizeof data;
err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf, &len);
if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
{
/* On the first use of the socket server during the operation,
allow for the old server port dying. */
server = _hurd_socket_server (PF_INET, 1);
if (server == MACH_PORT_NULL)
goto out;
err = __pfinet_siocgifconf (server, -1, &ifc.ifc_buf, &len);
}
if (err)
goto out;
ifc.ifc_len = len;
nifs = len / sizeof (struct ifreq);
}
idx = malloc ((nifs + 1) * sizeof (struct if_nameindex));
if (idx == NULL)
{
err = ENOBUFS;
goto out;
}
for (i = 0; i < nifs; ++i)
{
struct ifreq *ifr = &ifc.ifc_req[i];
idx[i].if_name = __strdup (ifr->ifr_name);
if (idx[i].if_name == NULL
|| __ioctl (fd, SIOCGIFINDEX, ifr) < 0)
{
unsigned int j;
err = errno;
for (j = 0; j < i; ++j)
free (idx[j].if_name);
free (idx);
idx = NULL;
if (err == EINVAL)
err = ENOSYS;
else if (err == ENOMEM)
err = ENOBUFS;
goto out;
}
idx[i].if_index = ifr->ifr_ifindex;
}
idx[i].if_index = 0;
idx[i].if_name = NULL;
out:
__close (fd);
if (data != ifc.ifc_buf)
__vm_deallocate (__mach_task_self (), (vm_address_t) ifc.ifc_buf,
ifc.ifc_len);
__set_errno (err);
return idx;
}
weak_alias (__if_nameindex, if_nameindex)
libc_hidden_weak (if_nameindex)
/* Store the name of the interface corresponding to index IFINDEX in
IFNAME (which has space for at least IFNAMSIZ characters). Return
IFNAME, or NULL on error. */
char *
__if_indextoname (unsigned int ifindex, char *ifname)
{
struct ifreq ifr;
int fd = __opensock ();
if (fd < 0)
return NULL;
ifr.ifr_ifindex = ifindex;
if (__ioctl (fd, SIOCGIFNAME, &ifr) < 0)
{
int saved_errno = errno;
__close (fd);
if (saved_errno == EINVAL || saved_errno == ENOTTY)
__set_errno (ENOSYS);
else if (saved_errno == ENODEV)
__set_errno (ENXIO);
return NULL;
}
__close (fd);
return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
}
weak_alias (__if_indextoname, if_indextoname)
libc_hidden_weak (if_indextoname)
#if 0
void
__protocol_available (int *have_inet, int *have_inet6)
{
*have_inet = _hurd_socket_server (PF_INET, 0) != MACH_PORT_NULL;
*have_inet6 = _hurd_socket_server (PF_INET6, 0) != MACH_PORT_NULL;
}
#endif
|
