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 | |
… | |
… | |
60 | |
73 | |
61 | extern void id2mac (unsigned int id, void *m); |
74 | extern void id2mac (unsigned int id, void *m); |
62 | |
75 | |
63 | #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]) |
64 | |
77 | |
65 | struct sliding_window { |
78 | struct sliding_window |
|
|
79 | { |
66 | u32 v[(WINDOWSIZE + 31) / 32]; |
80 | u32 v[(WINDOWSIZE + 31) / 32]; |
67 | u32 seq; |
81 | u32 seq; |
68 | |
82 | |
69 | void reset (u32 seqno) |
83 | void reset (u32 seqno) |
70 | { |
84 | { |
71 | memset (v, -1, sizeof v); |
85 | memset (v, -1, sizeof v); |
72 | seq = seqno; |
86 | seq = seqno; |
73 | } |
87 | } |
74 | |
88 | |
75 | bool recv_ok (u32 seqno) |
89 | // 0 == ok, 1 == silently ignore, 2 == error, reset |
|
|
90 | int seqno_classify (u32 seqno) |
76 | { |
91 | { |
77 | if (seqno <= seq - WINDOWSIZE) |
92 | if (seqno <= seq - WINDOWSIZE) |
78 | slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" |
93 | return 1; |
79 | "possible replay attack, or just massive packet reordering"), seqno, seq + 1); |
|
|
80 | else if (seqno > seq + WINDOWSIZE * 4) |
94 | else if (seqno > seq + WINDOWSIZE * 16) |
81 | slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" |
95 | return 2; |
82 | "possible replay attack, or just massive packet loss"), seqno, seq + 1); |
|
|
83 | else |
96 | else |
84 | { |
97 | { |
85 | while (seqno > seq) |
98 | while (seqno > seq) |
86 | { |
99 | { |
87 | seq++; |
100 | seq++; |
… | |
… | |
96 | u32 s = seqno % WINDOWSIZE; |
109 | u32 s = seqno % WINDOWSIZE; |
97 | u32 *cell = v + (s >> 5); |
110 | u32 *cell = v + (s >> 5); |
98 | u32 mask = 1 << (s & 31); |
111 | u32 mask = 1 << (s & 31); |
99 | |
112 | |
100 | if (*cell & mask) |
113 | if (*cell & mask) |
101 | slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" |
114 | return 1; |
102 | "possible replay attack, or just packet duplication"), seqno, seq + 1); |
|
|
103 | else |
115 | else |
104 | { |
116 | { |
105 | *cell |= mask; |
117 | *cell |= mask; |
106 | return true; |
118 | return 0; |
107 | } |
119 | } |
108 | } |
120 | } |
109 | |
|
|
110 | return false; |
|
|
111 | } |
121 | } |
112 | }; |
122 | }; |
113 | |
123 | |
114 | typedef callback0<const char *> run_script_cb; |
124 | typedef callback<const char * ()> run_script_cb; |
115 | |
125 | |
116 | // run a shell script (or actually an external program). |
126 | // run a shell script (or actually an external program). |
117 | bool run_script (const run_script_cb &cb, bool wait); |
127 | pid_t run_script (const run_script_cb &cb, bool wait); |
118 | |
128 | |
119 | #if ENABLE_HTTP_PROXY |
129 | #if ENABLE_HTTP_PROXY |
120 | u8 *base64_encode (const u8 *data, unsigned int len); |
130 | u8 *base64_encode (const u8 *data, unsigned int len); |
121 | #endif |
131 | #endif |
122 | |
132 | |