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
|
/*
Copyright (C) 2000,02 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "pfinet.h"
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/ip.h>
#include <net/route.h>
#include <net/sock.h>
#include <net/ip_fib.h>
#include <net/addrconf.h>
#include "pfinet_S.h"
#include <netinet/in.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <mach/notify.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#define MAX_ROUTES 255
extern int dev_ifconf(char *arg);
/* Return the list of devices in the format provided by SIOCGIFCONF
in IFR, but don't return more then AMOUNT bytes. If AMOUNT is
negative, there is no limit. */
kern_return_t
S_pfinet_siocgifconf (io_t port,
vm_size_t amount,
data_t *ifr,
mach_msg_type_number_t *len)
{
error_t err = 0;
struct ifconf ifc;
pthread_mutex_lock (&global_lock);
if (amount == (vm_size_t) -1)
{
/* Get the needed buffer length. */
ifc.ifc_buf = NULL;
ifc.ifc_len = 0;
err = dev_ifconf ((char *) &ifc);
if (err)
{
pthread_mutex_unlock (&global_lock);
return -err;
}
amount = ifc.ifc_len;
}
else
ifc.ifc_len = amount;
if (amount > 0)
{
/* Possibly allocate a new buffer. */
if (*len < amount)
ifc.ifc_buf = (char *) mmap (0, amount, PROT_READ|PROT_WRITE,
MAP_ANON, 0, 0);
else
ifc.ifc_buf = *ifr;
err = dev_ifconf ((char *) &ifc);
}
if (err)
{
*len = 0;
if (ifc.ifc_buf != *ifr)
munmap (ifc.ifc_buf, amount);
}
else
{
*len = ifc.ifc_len;
*ifr = ifc.ifc_buf;
}
pthread_mutex_unlock (&global_lock);
return err;
}
int
get_routing_table(int start, int count, ifrtreq_t *routes)
{
struct fib_table *tb;
if (!routes)
return 0;
if ((tb = fib_get_table(RT_TABLE_MAIN)) == NULL)
return 0;
return fn_hash_get_routes(tb, routes, start, count);
}
/* Return the routing table as a series of ifrtreq_t structs
in routes, but don't return more then AMOUNT number of them.
If AMOUNT is -1, we get the full table. */
kern_return_t
S_pfinet_getroutes (io_t port,
vm_size_t amount,
data_t *routes,
mach_msg_type_number_t *len,
boolean_t *dealloc_data)
{
error_t err = 0;
ifrtreq_t rs[MAX_ROUTES];
int n;
ifrtreq_t *rtable = NULL;
pthread_mutex_lock (&global_lock);
if (dealloc_data)
*dealloc_data = FALSE;
if (amount == (vm_size_t) -1)
{
/* Get all of them, and return the number we got. */
n = get_routing_table (0, MAX_ROUTES, rs);
amount = n;
}
else
n = amount;
if (amount > 0)
{
/* Possibly allocate a new buffer. */
if (*len < amount * sizeof(ifrtreq_t))
{
rtable = (ifrtreq_t *) mmap (0, amount * sizeof(ifrtreq_t), PROT_READ|PROT_WRITE,
MAP_ANON, 0, 0);
if (dealloc_data)
*dealloc_data = TRUE;
}
else
rtable = (ifrtreq_t *)*routes;
n = get_routing_table (0, n, rtable);
if (amount > n)
memset(&rtable[n], 0, (amount - n) * sizeof(ifrtreq_t));
}
if (rtable == MAP_FAILED)
{
/* Should use errno here, but glue headers #undef errno */
err = ENOMEM;
*len = 0;
}
else
{
*len = n * sizeof(ifrtreq_t);
*routes = (char *)rtable;
}
pthread_mutex_unlock (&global_lock);
return err;
}
|
