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Comparing gvpe/src/util.h (file contents):
Revision 1.19 by pcg, Tue Jun 21 08:34:47 2005 UTC vs.
Revision 1.28 by pcg, Sun Aug 10 15:04:55 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 Lehmann <gvpe@schmorp.de> 5 2003-2008 Marc Lehmann <gvpe@schmorp.de>
6 6
7 This file is part of GVPE. 7 This file is part of GVPE.
8 8
9 GVPE is free software; you can redistribute it and/or modify 9 GVPE is free software; you can redistribute it and/or modify it
10 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
11 the Free Software Foundation; either version 2 of the License, or 11 Free Software Foundation; either version 3 of the License, or (at your
12 (at your option) any later version. 12 option) any later version.
13 13
14 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
15 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
17 GNU General Public License for more details. 17 Public License for more details.
18 18
19 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
20 along with gvpe; if not, write to the Free Software 20 with this program; if not, see <http://www.gnu.org/licenses/>.
21 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.
22*/ 32*/
23 33
24#ifndef UTIL_H__ 34#ifndef UTIL_H__
25#define UTIL_H__ 35#define UTIL_H__
36
37#include <cstring>
38#include <sys/types.h>
26 39
27#include <openssl/rsa.h> 40#include <openssl/rsa.h>
28 41
29#include "gettext.h" 42#include "gettext.h"
30 43
31#include "slog.h" 44#include "slog.h"
32#include "iom.h" 45#include "ev_cpp.h"
46#include "callback.h"
47
48typedef ev_tstamp tstamp;
33 49
34/* 50/*
35 * check for an existing gvpe for this net, and write pid to pidfile 51 * check for an existing gvpe for this net, and write pid to pidfile
36 */ 52 */
37extern int write_pidfile (void); 53extern int write_pidfile (void);
… …
57 73
58extern void id2mac (unsigned int id, void *m); 74extern void id2mac (unsigned int id, void *m);
59 75
60#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5]) 76#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5])
61 77
62struct sliding_window { 78struct sliding_window
79{
63 u32 v[(WINDOWSIZE + 31) / 32]; 80 u32 v[(WINDOWSIZE + 31) / 32];
64 u32 seq; 81 u32 seq;
65 82
66 void reset (u32 seqno) 83 void reset (u32 seqno)
67 { 84 {
68 memset (v, -1, sizeof v); 85 memset (v, -1, sizeof v);
69 seq = seqno; 86 seq = seqno;
70 } 87 }
71 88
72 bool recv_ok (u32 seqno) 89 // 0 == ok, 1 == far history, 2 == duplicate in-window, 3 == far future
90 int seqno_classify (u32 seqno)
73 { 91 {
74 if (seqno <= seq - WINDOWSIZE) 92 if (seqno <= seq - WINDOWSIZE)
75 slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" 93 return 1;
76 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);
77 else if (seqno > seq + WINDOWSIZE * 4) 94 else if (seqno > seq + WINDOWSIZE * 16)
78 slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" 95 return 3;
79 "possible replay attack, or just massive packet loss"), seqno, seq + 1);
80 else 96 else
81 { 97 {
82 while (seqno > seq) 98 while (seqno > seq)
83 { 99 {
84 seq++; 100 seq++;
… …
93 u32 s = seqno % WINDOWSIZE; 109 u32 s = seqno % WINDOWSIZE;
94 u32 *cell = v + (s >> 5); 110 u32 *cell = v + (s >> 5);
95 u32 mask = 1 << (s & 31); 111 u32 mask = 1 << (s & 31);
96 112
97 if (*cell & mask) 113 if (*cell & mask)
98 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 114 return 2;
99 "possible replay attack, or just packet duplication"), seqno, seq + 1);
100 else 115 else
101 { 116 {
102 *cell |= mask; 117 *cell |= mask;
103 return true; 118 return 0;
104 } 119 }
105 } 120 }
106
107 return false;
108 } 121 }
109}; 122};
110 123
111typedef callback0<const char *> run_script_cb; 124typedef callback<const char * ()> run_script_cb;
112 125
113// run a shell script (or actually an external program). 126// run a shell script (or actually an external program).
114bool run_script (const run_script_cb &cb, bool wait); 127pid_t run_script (const run_script_cb &cb, bool wait);
115 128
116#if ENABLE_HTTP_PROXY 129#if ENABLE_HTTP_PROXY
117u8 *base64_encode (const u8 *data, unsigned int len); 130u8 *base64_encode (const u8 *data, unsigned int len);
118#endif 131#endif
119 132

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