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Comparing gvpe/src/util.h (file contents):
Revision 1.6 by pcg, Wed Apr 2 05:15:00 2003 UTC vs.
Revision 1.25 by pcg, Thu Aug 7 17:54:27 2008 UTC

1/* 1/*
2 util.h -- process management and other utility functions 2 util.h -- process management and other utility functions
3 Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> 3 Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
4 2000-2002 Guus Sliepen <guus@sliepen.eu.org> 4 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
5 2003 Marc Lehmannn <pcg@goof.com> 5 2003-2008 Marc Lehmann <gvpe@schmorp.de>
6 6
7 This file is part of GVPE.
8
7 This program is free software; you can redistribute it and/or modify 9 GVPE is free software; you can redistribute it and/or modify it
8 it under the terms of the GNU General Public License as published by 10 under the terms of the GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 11 Free Software Foundation; either version 3 of the License, or (at your
10 (at your option) any later version. 12 option) any later version.
11 13
12 This program is distributed in the hope that it will be useful, 14 This program is distributed in the hope that it will be useful, but
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 GNU General Public License for more details. 17 Public License for more details.
16 18
17 You should have received a copy of the GNU General Public License 19 You should have received a copy of the GNU General Public License along
18 along with this program; if not, write to the Free Software 20 with this program; if not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21
22 Additional permission under GNU GPL version 3 section 7
23
24 If you modify this Program, or any covered work, by linking or
25 combining it with the OpenSSL project's OpenSSL library (or a modified
26 version of that library), containing parts covered by the terms of the
27 OpenSSL or SSLeay licenses, the licensors of this Program grant you
28 additional permission to convey the resulting work. Corresponding
29 Source for a non-source form of such a combination shall include the
30 source code for the parts of OpenSSL used as well as that of the
31 covered work.
20*/ 32*/
21 33
22#ifndef UTIL_H__ 34#ifndef UTIL_H__
23#define UTIL_H__ 35#define UTIL_H__
24 36
37#include <cstring>
38
39#include <openssl/rsa.h>
40
41#include "gettext.h"
42
25#include "iom.h" 43#include "slog.h"
26#include "device.h" 44#include "ev_cpp.h"
45#include "callback.h"
46
47typedef ev_tstamp tstamp;
27 48
28/* 49/*
29 * check for an existing vped for this net, and write pid to pidfile 50 * check for an existing gvpe for this net, and write pid to pidfile
30 */ 51 */
31extern int write_pidfile (void); 52extern int write_pidfile (void);
32 53
33/* 54/*
34 * kill older vped 55 * kill older gvpe
35 */ 56 */
36extern int kill_other (int signal); 57extern int kill_other (int signal);
37 58
38/* 59/*
39 * Detach from current terminal, write pidfile, kill parent 60 * Detach from current terminal, write pidfile, kill parent
40 */ 61 */
41extern int detach (int do_detach); 62extern int detach (int do_detach);
42 63
43/* 64/*
44 * Set all files and paths according to netname
45 */
46extern void make_names (void);
47
48/*
49 * check wether the given path is an absolute pathname 65 * check wether the given path is an absolute pathname
50 */ 66 */
51#define ABSOLUTE_PATH(c) ((c)[0] == '/') 67#define ABSOLUTE_PATH(c) ((c)[0] == '/')
52 68
53static inline void 69/*****************************************************************************/
70
71typedef u8 mac[6];
72
54id2mac (unsigned int id, void *m) 73extern void id2mac (unsigned int id, void *m);
74
75#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5])
76
77struct sliding_window
55{ 78{
56 mac &p = *(mac *)m;
57
58 p[0] = 0xfe;
59 p[1] = 0xfd;
60 p[2] = 0x80;
61 p[3] = 0x00;
62 p[4] = id >> 8;
63 p[5] = id;
64}
65
66#define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5])
67
68struct sliding_window {
69 u32 v[(WINDOWSIZE + 31) / 32]; 79 u32 v[(WINDOWSIZE + 31) / 32];
70 u32 seq; 80 u32 seq;
71 81
72 void reset (u32 seqno) 82 void reset (u32 seqno)
73 { 83 {
… …
77 87
78 bool recv_ok (u32 seqno) 88 bool recv_ok (u32 seqno)
79 { 89 {
80 if (seqno <= seq - WINDOWSIZE) 90 if (seqno <= seq - WINDOWSIZE)
81 slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" 91 slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n"
82 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);//D 92 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);
83 else if (seqno > seq + WINDOWSIZE) 93 else if (seqno > seq + WINDOWSIZE * 4)
84 slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" 94 slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n"
85 "possible replay attack, or just massive packet loss"), seqno, seq + 1);//D 95 "possible replay attack, or just massive packet loss"), seqno, seq + 1);
86 else 96 else
87 { 97 {
88 while (seqno > seq) 98 while (seqno > seq)
89 { 99 {
90 seq++; 100 seq++;
… …
99 u32 s = seqno % WINDOWSIZE; 109 u32 s = seqno % WINDOWSIZE;
100 u32 *cell = v + (s >> 5); 110 u32 *cell = v + (s >> 5);
101 u32 mask = 1 << (s & 31); 111 u32 mask = 1 << (s & 31);
102 112
103 if (*cell & mask) 113 if (*cell & mask)
104 {
105 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 114 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n"
106 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D 115 "possible replay attack, or just packet duplication"), seqno, seq + 1);
107 return false;
108 }
109 else 116 else
110 { 117 {
111 *cell |= mask; 118 *cell |= mask;
112 return true; 119 return true;
113 } 120 }
114 } 121 }
122
123 return false;
115 } 124 }
116}; 125};
117 126
118typedef callback0<const char *> run_script_cb; 127typedef callback<const char * ()> run_script_cb;
119 128
120// run a shell script (or actually an external program). 129// run a shell script (or actually an external program).
121void run_script (const run_script_cb &cb, bool wait); 130bool run_script (const run_script_cb &cb, bool wait);
131
132#if ENABLE_HTTP_PROXY
133u8 *base64_encode (const u8 *data, unsigned int len);
134#endif
135
136/*****************************************************************************/
137
138typedef u8 rsaclear[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
139typedef u8 rsacrypt[RSA_KEYLEN]; // encrypted challenge
140
141static inline void
142rsa_encrypt (RSA *key, const rsaclear &chg, rsacrypt &encr)
143{
144 if (RSA_public_encrypt (sizeof chg,
145 (unsigned char *)&chg, (unsigned char *)&encr,
146 key, RSA_PKCS1_OAEP_PADDING) < 0)
147 fatal ("RSA_public_encrypt error");
148}
149
150static inline bool
151rsa_decrypt (RSA *key, const rsacrypt &encr, rsaclear &chg)
152{
153 return RSA_private_decrypt (sizeof encr,
154 (unsigned char *)&encr, (unsigned char *)&chg,
155 key, RSA_PKCS1_OAEP_PADDING) > 0;
156}
122 157
123#endif 158#endif
124 159

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