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authorChristian Fuchs <christian.fuchs@cfuchs.net>2012-11-16 09:03:54 +0000
committerChristian Fuchs <christian.fuchs@cfuchs.net>2012-11-16 09:03:54 +0000
commit934db0fcddb6c3fb793e1995cb3441b22945809a (patch)
tree2733162eb5d053e34b3acf653b35b9175df4dcea
parent246cd58943ccff6dd50bb10d5e01ea8ba4e2e0f5 (diff)
downloadgnunet-934db0fcddb6c3fb793e1995cb3441b22945809a.tar.gz
gnunet-934db0fcddb6c3fb793e1995cb3441b22945809a.zip
- added vpn helper stub for win32 builds
- modified vpn-makefile definitions to process gnunet-helper-vpn-windows instead of the regular one when using mingw as toolchain
-rw-r--r--src/vpn/Makefile.am11
-rw-r--r--src/vpn/gnunet-helper-vpn-windows.c282
2 files changed, 290 insertions, 3 deletions
diff --git a/src/vpn/Makefile.am b/src/vpn/Makefile.am
index 71601383e..b80be7749 100644
--- a/src/vpn/Makefile.am
+++ b/src/vpn/Makefile.am
@@ -2,6 +2,7 @@ INCLUDES = -I$(top_srcdir)/src/include
2 2
3if MINGW 3if MINGW
4 WINFLAGS = -Wl,--no-undefined -Wl,--export-all-symbols 4 WINFLAGS = -Wl,--no-undefined -Wl,--export-all-symbols
5 VPNBIN = gnunet-helper-vpn
5endif 6endif
6 7
7if USE_COVERAGE 8if USE_COVERAGE
@@ -37,9 +38,13 @@ libexec_PROGRAMS = \
37bin_PROGRAMS = \ 38bin_PROGRAMS = \
38 gnunet-vpn 39 gnunet-vpn
39 40
40gnunet_helper_vpn_SOURCES = \ 41if MINGW
41 gnunet-helper-vpn.c 42 gnunet_helper_vpn_SOURCES = \
42 43 gnunet-helper-vpn-windows.c
44else
45 gnunet_helper_vpn_SOURCES = \
46 gnunet-helper-vpn.c
47endif
43gnunet_service_vpn_SOURCES = \ 48gnunet_service_vpn_SOURCES = \
44 gnunet-service-vpn.c 49 gnunet-service-vpn.c
45gnunet_service_vpn_LDADD = \ 50gnunet_service_vpn_LDADD = \
diff --git a/src/vpn/gnunet-helper-vpn-windows.c b/src/vpn/gnunet-helper-vpn-windows.c
new file mode 100644
index 000000000..8ac68132e
--- /dev/null
+++ b/src/vpn/gnunet-helper-vpn-windows.c
@@ -0,0 +1,282 @@
1/*
2 This file is part of GNUnet.
3 (C) 2010, 2012 Christian Grothoff
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @file vpn/gnunet-helper-vpn-windows.c
23 * @brief the helper for the VPN service in win32 builds.
24 * Opens a virtual network-interface, sends data received on the if to stdout,
25 * sends data received on stdin to the interface
26 * @author Christian M. Fuchs
27 *
28 * The following list of people have reviewed this code and considered
29 * it safe since the last modification (if you reviewed it, please
30 * have your name added to the list):
31 *
32 */
33
34#include "platform.h"
35
36/**
37 * Need 'struct GNUNET_MessageHeader'.
38 */
39#include "gnunet_common.h"
40
41/**
42 * Need VPN message types.
43 */
44#include "gnunet_protocols.h"
45
46/**
47 * Should we print (interesting|debug) messages that can happen during
48 * normal operation?
49 */
50#define DEBUG GNUNET_NO
51
52/**
53 * Maximum size of a GNUnet message (GNUNET_SERVER_MAX_MESSAGE_SIZE)
54 */
55#define MAX_SIZE 65536
56
57/**
58 * Creates a tun-interface called dev;
59 *
60 * @param dev is asumed to point to a char[IFNAMSIZ]
61 * if *dev == '\\0', uses the name supplied by the kernel;
62 * @return the fd to the tun or -1 on error
63 */
64static int
65init_tun (char *dev)
66{
67 int fd;
68
69 if (NULL == dev)
70 {
71 errno = EINVAL;
72 return -1;
73 }
74
75 /* Hello, I am a stub function! I did my job, yay me! */
76
77 return fd;
78}
79
80
81/**
82 * @brief Sets the IPv6-Address given in address on the interface dev
83 *
84 * @param dev the interface to configure
85 * @param address the IPv6-Address
86 * @param prefix_len the length of the network-prefix
87 */
88static void
89set_address6 (const char *dev, const char *address, unsigned long prefix_len)
90{
91 int fd=0;
92
93 /*
94 * parse the new address
95 */
96
97 /*
98 * Get the index of the if
99 */
100
101 /*
102 * Set the address
103 */
104
105 /*
106 * Get the flags
107 */
108
109
110 /*
111 * Add the UP and RUNNING flags
112 */
113
114
115 if (0 != close (fd))
116 {
117 fprintf (stderr, "close failed: %s\n", strerror (errno));
118 exit (1);
119 }
120}
121
122
123/**
124 * @brief Sets the IPv4-Address given in address on the interface dev
125 *
126 * @param dev the interface to configure
127 * @param address the IPv4-Address
128 * @param mask the netmask
129 */
130static void
131set_address4 (const char *dev, const char *address, const char *mask)
132{
133 int fd=0;
134
135 /*
136 * Parse the address
137 */
138
139 /*
140 * Set the address
141 */
142
143 /*
144 * Parse the netmask
145 */
146
147
148 /*
149 * Set the netmask
150 */
151
152
153 /*
154 * Get the flags
155 */
156
157
158 /*
159 * Add the UP and RUNNING flags
160 */
161
162
163 if (0 != close (fd))
164 {
165 fprintf (stderr, "close failed: %s\n", strerror (errno));
166 (void) close (fd);
167 exit (1);
168 }
169}
170
171
172/**
173 * Start forwarding to and from the tunnel.
174 *
175 * @param fd_tun tunnel FD
176 */
177static void
178run (int fd_tun)
179{
180 /*
181 * The buffer filled by reading from fd_tun
182 */
183 unsigned char buftun[MAX_SIZE];
184 ssize_t buftun_size = 0;
185 unsigned char *buftun_read = NULL;
186
187 /*
188 * The buffer filled by reading from stdin
189 */
190 unsigned char bufin[MAX_SIZE];
191 ssize_t bufin_size = 0;
192 size_t bufin_rpos = 0;
193 unsigned char *bufin_read = NULL;
194 /* Hello, I am a stub function! I did my job, yay me! */
195}
196
197
198/**
199 * Open VPN tunnel interface.
200 *
201 * @param argc must be 6
202 * @param argv 0: binary name (gnunet-helper-vpn)
203 * 1: tunnel interface name (gnunet-vpn)
204 * 2: IPv6 address (::1), "-" to disable
205 * 3: IPv6 netmask length in bits (64), ignored if #2 is "-"
206 * 4: IPv4 address (1.2.3.4), "-" to disable
207 * 5: IPv4 netmask (255.255.0.0), ignored if #4 is "-"
208 */
209int
210main (int argc, char **argv)
211{
212 //char dev[IFNAMSIZ];
213 int fd_tun;
214 int global_ret;
215
216 if (6 != argc)
217 {
218 fprintf (stderr, "Fatal: must supply 5 arguments!\n");
219 return 1;
220 }
221
222 /*
223 * strncpy (dev, argv[1], IFNAMSIZ);
224 * dev[IFNAMSIZ - 1] = '\0';
225 */
226/* if (-1 == (fd_tun = init_tun (dev)))
227 {
228 fprintf (stderr, "Fatal: could not initialize tun-interface with IPv6 %s/%s and IPv4 %s/%s\n",
229 dev,
230 argv[2],
231 argv[3],
232 argv[4],
233 argv[5]);
234 return 1;
235 }
236 */
237
238 if (0 != strcmp (argv[2], "-"))
239 {
240 const char *address = argv[2];
241 long prefix_len = atol (argv[3]);
242
243 if ((prefix_len < 1) || (prefix_len > 127))
244 {
245 fprintf (stderr, "Fatal: prefix_len out of range\n");
246 return 1;
247 }
248
249 //set_address6 (dev, address, prefix_len);
250 }
251
252 if (0 != strcmp (argv[4], "-"))
253 {
254 const char *address = argv[4];
255 const char *mask = argv[5];
256
257 set_address4 (NULL, address, mask);
258 }
259
260 /*
261 uid_t uid = getuid ();
262 if (0 != setresuid (uid, uid, uid))
263 {
264 fprintf (stderr, "Failed to setresuid: %s\n", strerror (errno));
265 global_ret = 2;
266 goto cleanup;
267 }
268 */
269
270 /*if (SIG_ERR == signal (SIGPIPE, SIG_IGN))
271 {
272 fprintf (stderr, "Failed to protect against SIGPIPE: %s\n",
273 strerror (errno));
274 // no exit, we might as well die with SIGPIPE should it ever happen
275 }
276 */
277 //run (fd_tun);
278 global_ret = 0;
279 cleanup:
280 //close (fd_tun);
281 return global_ret;
282}