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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 1.21 by pcg, Sat Dec 1 23:35:31 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 <openssl/rsa.h>
28
29#include "gettext.h"
30
25#include "iom.h" 31#include "slog.h"
26#include "device.h" 32#include "ev_cpp.h"
33#include "callback.h"
34
35typedef ev_tstamp tstamp;
27 36
28/* 37/*
29 * check for an existing vped for this net, and write pid to pidfile 38 * check for an existing gvpe for this net, and write pid to pidfile
30 */ 39 */
31extern int write_pidfile (void); 40extern int write_pidfile (void);
32 41
33/* 42/*
34 * kill older vped 43 * kill older gvpe
35 */ 44 */
36extern int kill_other (int signal); 45extern int kill_other (int signal);
37 46
38/* 47/*
39 * Detach from current terminal, write pidfile, kill parent 48 * Detach from current terminal, write pidfile, kill parent
40 */ 49 */
41extern int detach (int do_detach); 50extern int detach (int do_detach);
42 51
43/* 52/*
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 53 * check wether the given path is an absolute pathname
50 */ 54 */
51#define ABSOLUTE_PATH(c) ((c)[0] == '/') 55#define ABSOLUTE_PATH(c) ((c)[0] == '/')
52 56
53static inline void 57/*****************************************************************************/
54id2mac (unsigned int id, void *m)
55{
56 mac &p = *(mac *)m;
57 58
58 p[0] = 0xfe; 59typedef u8 mac[6];
59 p[1] = 0xfd;
60 p[2] = 0x80;
61 p[3] = 0x00;
62 p[4] = id >> 8;
63 p[5] = id;
64}
65 60
61extern void id2mac (unsigned int id, void *m);
62
66#define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5]) 63#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5])
67 64
68struct sliding_window { 65struct sliding_window {
69 u32 v[(WINDOWSIZE + 31) / 32]; 66 u32 v[(WINDOWSIZE + 31) / 32];
70 u32 seq; 67 u32 seq;
71 68
… …
77 74
78 bool recv_ok (u32 seqno) 75 bool recv_ok (u32 seqno)
79 { 76 {
80 if (seqno <= seq - WINDOWSIZE) 77 if (seqno <= seq - WINDOWSIZE)
81 slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" 78 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 79 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);
83 else if (seqno > seq + WINDOWSIZE) 80 else if (seqno > seq + WINDOWSIZE * 4)
84 slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" 81 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 82 "possible replay attack, or just massive packet loss"), seqno, seq + 1);
86 else 83 else
87 { 84 {
88 while (seqno > seq) 85 while (seqno > seq)
89 { 86 {
90 seq++; 87 seq++;
… …
99 u32 s = seqno % WINDOWSIZE; 96 u32 s = seqno % WINDOWSIZE;
100 u32 *cell = v + (s >> 5); 97 u32 *cell = v + (s >> 5);
101 u32 mask = 1 << (s & 31); 98 u32 mask = 1 << (s & 31);
102 99
103 if (*cell & mask) 100 if (*cell & mask)
104 {
105 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 101 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n"
106 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D 102 "possible replay attack, or just packet duplication"), seqno, seq + 1);
107 return false;
108 }
109 else 103 else
110 { 104 {
111 *cell |= mask; 105 *cell |= mask;
112 return true; 106 return true;
113 } 107 }
114 } 108 }
109
110 return false;
115 } 111 }
116}; 112};
117 113
118typedef callback0<const char *> run_script_cb; 114typedef callback0<const char *> run_script_cb;
119 115
120// run a shell script (or actually an external program). 116// run a shell script (or actually an external program).
121void run_script (const run_script_cb &cb, bool wait); 117bool run_script (const run_script_cb &cb, bool wait);
122 118
123#if ENABLE_HTTP_PROXY 119#if ENABLE_HTTP_PROXY
124u8 *base64_encode (const u8 *data, unsigned int len); 120u8 *base64_encode (const u8 *data, unsigned int len);
125#endif 121#endif
126 122
123/*****************************************************************************/
124
125typedef u8 rsaclear[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
126typedef u8 rsacrypt[RSA_KEYLEN]; // encrypted challenge
127
128static inline void
129rsa_encrypt (RSA *key, const rsaclear &chg, rsacrypt &encr)
130{
131 if (RSA_public_encrypt (sizeof chg,
132 (unsigned char *)&chg, (unsigned char *)&encr,
133 key, RSA_PKCS1_OAEP_PADDING) < 0)
134 fatal ("RSA_public_encrypt error");
135}
136
137static inline bool
138rsa_decrypt (RSA *key, const rsacrypt &encr, rsaclear &chg)
139{
140 return RSA_private_decrypt (sizeof encr,
141 (unsigned char *)&encr, (unsigned char *)&chg,
142 key, RSA_PKCS1_OAEP_PADDING) > 0;
143}
144
127#endif 145#endif
128 146

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