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Comparing gvpe/src/util.h (file contents):
Revision 1.3 by pcg, Fri Mar 21 23:17:01 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
25#include <sys/socket.h> 27#include <cstring>
26#include <netinet/in.h>
27 28
28#include <map> 29#include <openssl/rsa.h>
29 30
30#include "iom.h"
31#include "device.h" 31#include "gettext.h"
32 32
33#define SOCKADDR sockaddr_in // this is lame, I know 33#include "slog.h"
34#include "ev_cpp.h"
35#include "callback.h"
36
37typedef ev_tstamp tstamp;
34 38
35/* 39/*
36 * 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
37 */ 41 */
38extern int write_pidfile (void); 42extern int write_pidfile (void);
39 43
40/* 44/*
41 * kill older vped 45 * kill older gvpe
42 */ 46 */
43extern int kill_other (int signal); 47extern int kill_other (int signal);
44 48
45/* 49/*
46 * Detach from current terminal, write pidfile, kill parent 50 * Detach from current terminal, write pidfile, kill parent
47 */ 51 */
48extern int detach (int do_detach); 52extern int detach (int do_detach);
49 53
50/* 54/*
51 * Set all files and paths according to netname
52 */
53extern void make_names (void);
54
55/*
56 * check wether the given path is an absolute pathname 55 * check wether the given path is an absolute pathname
57 */ 56 */
58#define ABSOLUTE_PATH(c) ((c)[0] == '/') 57#define ABSOLUTE_PATH(c) ((c)[0] == '/')
59 58
60static inline void 59/*****************************************************************************/
60
61typedef u8 mac[6];
62
61id2mac (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
62{ 68{
63 mac &p = *(mac *)m;
64
65 p[0] = 0xfe;
66 p[1] = 0xfd;
67 p[2] = 0x80;
68 p[3] = 0x00;
69 p[4] = id >> 8;
70 p[5] = id;
71}
72
73#define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5])
74
75struct sockinfo
76 {
77 u32 host;
78 u16 port;
79
80 void set (const SOCKADDR *sa)
81 {
82 host = sa->sin_addr.s_addr;
83 port = sa->sin_port;
84 }
85
86 sockinfo()
87 {
88 host = port = 0;
89 }
90
91 sockinfo(const SOCKADDR &sa)
92 {
93 set (&sa);
94 }
95
96 sockinfo(const SOCKADDR *sa)
97 {
98 set (sa);
99 }
100
101 SOCKADDR *sa()
102 {
103 static SOCKADDR sa;
104
105 sa.sin_family = AF_INET;
106 sa.sin_port = port;
107 sa.sin_addr.s_addr = host;
108
109 return &sa;
110 }
111
112 operator const char *();
113 };
114
115inline bool
116operator == (const sockinfo &a, const sockinfo &b)
117{
118 return a.host == b.host && a.port == b.port;
119}
120
121inline bool
122operator < (const sockinfo &a, const sockinfo &b)
123{
124 return a.host < b.host
125 || (a.host == b.host && a.port < b.port);
126}
127
128struct sliding_window {
129 u32 v[(WINDOWSIZE + 31) / 32]; 69 u32 v[(WINDOWSIZE + 31) / 32];
130 u32 seq; 70 u32 seq;
131 71
132 void reset (u32 seqno) 72 void reset (u32 seqno)
133 { 73 {
… …
137 77
138 bool recv_ok (u32 seqno) 78 bool recv_ok (u32 seqno)
139 { 79 {
140 if (seqno <= seq - WINDOWSIZE) 80 if (seqno <= seq - WINDOWSIZE)
141 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"
142 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);//D 82 "possible replay attack, or just massive packet reordering"), seqno, seq + 1);
143 else if (seqno > seq + WINDOWSIZE) 83 else if (seqno > seq + WINDOWSIZE * 4)
144 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"
145 "possible replay attack, or just massive packet loss"), seqno, seq + 1);//D 85 "possible replay attack, or just massive packet loss"), seqno, seq + 1);
146 else 86 else
147 { 87 {
148 while (seqno > seq) 88 while (seqno > seq)
149 { 89 {
150 seq++; 90 seq++;
… …
158 98
159 u32 s = seqno % WINDOWSIZE; 99 u32 s = seqno % WINDOWSIZE;
160 u32 *cell = v + (s >> 5); 100 u32 *cell = v + (s >> 5);
161 u32 mask = 1 << (s & 31); 101 u32 mask = 1 << (s & 31);
162 102
163 //printf ("received seqno %08lx, seq %08lx, mask %08lx is %08lx\n", seqno, seq, mask, ismask);
164 if (*cell & mask) 103 if (*cell & mask)
165 {
166 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 104 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n"
167 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D 105 "possible replay attack, or just packet duplication"), seqno, seq + 1);
168 return false;
169 }
170 else 106 else
171 { 107 {
172 *cell |= mask; 108 *cell |= mask;
173 return true; 109 return true;
174 } 110 }
175 } 111 }
112
113 return false;
176 } 114 }
177}; 115};
178 116
117typedef callback<const char * ()> run_script_cb;
118
119// run a shell script (or actually an external program).
120bool run_script (const run_script_cb &cb, bool wait);
121
122#if ENABLE_HTTP_PROXY
123u8 *base64_encode (const u8 *data, unsigned int len);
179#endif 124#endif
180 125
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
148#endif
149

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