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Comparing gvpe/src/util.h (file contents):
Revision 1.7 by pcg, Mon Apr 7 01:12:56 2003 UTC vs.
Revision 1.24 by pcg, Tue Dec 4 14:55:59 2007 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 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
8 it under the terms of the GNU General Public License as published by 10 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or 11 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version. 12 (at your 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,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 but 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
15 GNU General Public License for more details. 17 GNU General 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
18 along with this program; if not, write to the Free Software 20 along with gvpe; if not, write to the Free Software
19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20*/ 22*/
21 23
22#ifndef UTIL_H__ 24#ifndef UTIL_H__
23#define UTIL_H__ 25#define UTIL_H__
24 26
27#include <cstring>
28
29#include <openssl/rsa.h>
30
31#include "gettext.h"
32
25#include "iom.h" 33#include "slog.h"
26#include "device.h" 34#include "ev_cpp.h"
35#include "callback.h"
36
37typedef ev_tstamp tstamp;
27 38
28/* 39/*
29 * check for an existing vped for this net, and write pid to pidfile 40 * check for an existing gvpe for this net, and write pid to pidfile
30 */ 41 */
31extern int write_pidfile (void); 42extern int write_pidfile (void);
32 43
33/* 44/*
34 * kill older vped 45 * kill older gvpe
35 */ 46 */
36extern int kill_other (int signal); 47extern int kill_other (int signal);
37 48
38/* 49/*
39 * Detach from current terminal, write pidfile, kill parent 50 * Detach from current terminal, write pidfile, kill parent
40 */ 51 */
41extern int detach (int do_detach); 52extern int detach (int do_detach);
42 53
43/* 54/*
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 55 * check wether the given path is an absolute pathname
50 */ 56 */
51#define ABSOLUTE_PATH(c) ((c)[0] == '/') 57#define ABSOLUTE_PATH(c) ((c)[0] == '/')
52 58
53static inline void 59/*****************************************************************************/
60
61typedef u8 mac[6];
62
54id2mac (unsigned int id, void *m) 63extern void id2mac (unsigned int id, void *m);
64
65#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5])
66
67struct sliding_window
55{ 68{
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]; 69 u32 v[(WINDOWSIZE + 31) / 32];
70 u32 seq; 70 u32 seq;
71 71
72 void reset (u32 seqno) 72 void reset (u32 seqno)
73 { 73 {
… …
77 77
78 bool recv_ok (u32 seqno) 78 bool recv_ok (u32 seqno)
79 { 79 {
80 if (seqno <= seq - WINDOWSIZE) 80 if (seqno <= seq - WINDOWSIZE)
81 slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" 81 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 82 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);
83 else if (seqno > seq + WINDOWSIZE) 83 else if (seqno > seq + WINDOWSIZE * 4)
84 slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" 84 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 85 "possible replay attack, or just massive packet loss"), seqno, seq + 1);
86 else 86 else
87 { 87 {
88 while (seqno > seq) 88 while (seqno > seq)
89 { 89 {
90 seq++; 90 seq++;
… …
99 u32 s = seqno % WINDOWSIZE; 99 u32 s = seqno % WINDOWSIZE;
100 u32 *cell = v + (s >> 5); 100 u32 *cell = v + (s >> 5);
101 u32 mask = 1 << (s & 31); 101 u32 mask = 1 << (s & 31);
102 102
103 if (*cell & mask) 103 if (*cell & mask)
104 {
105 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 104 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n"
106 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D 105 "possible replay attack, or just packet duplication"), seqno, seq + 1);
107 return false;
108 }
109 else 106 else
110 { 107 {
111 *cell |= mask; 108 *cell |= mask;
112 return true; 109 return true;
113 } 110 }
114 } 111 }
112
113 return false;
115 } 114 }
116}; 115};
117 116
118typedef callback0<const char *> run_script_cb; 117typedef callback<const char * ()> run_script_cb;
119 118
120// run a shell script (or actually an external program). 119// run a shell script (or actually an external program).
121void run_script (const run_script_cb &cb, bool wait); 120bool run_script (const run_script_cb &cb, bool wait);
122 121
123#if ENABLE_HTTP_PROXY 122#if ENABLE_HTTP_PROXY
124u8 *base64_encode (const u8 *data, unsigned int len); 123u8 *base64_encode (const u8 *data, unsigned int len);
125#endif 124#endif
126 125
126/*****************************************************************************/
127
128typedef u8 rsaclear[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
129typedef u8 rsacrypt[RSA_KEYLEN]; // encrypted challenge
130
131static inline void
132rsa_encrypt (RSA *key, const rsaclear &chg, rsacrypt &encr)
133{
134 if (RSA_public_encrypt (sizeof chg,
135 (unsigned char *)&chg, (unsigned char *)&encr,
136 key, RSA_PKCS1_OAEP_PADDING) < 0)
137 fatal ("RSA_public_encrypt error");
138}
139
140static inline bool
141rsa_decrypt (RSA *key, const rsacrypt &encr, rsaclear &chg)
142{
143 return RSA_private_decrypt (sizeof encr,
144 (unsigned char *)&encr, (unsigned char *)&chg,
145 key, RSA_PKCS1_OAEP_PADDING) > 0;
146}
147
127#endif 148#endif
128 149

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