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 <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 <openssl/rsa.h> |
27 | #include <openssl/rsa.h> |
26 | |
28 | |
27 | #include "gettext.h" |
29 | #include "gettext.h" |
28 | |
30 | |
29 | #include "slog.h" |
31 | #include "slog.h" |
30 | #include "iom.h" |
32 | #include "ev_cpp.h" |
|
|
33 | #include "callback.h" |
|
|
34 | |
|
|
35 | typedef ev_tstamp tstamp; |
31 | |
36 | |
32 | /* |
37 | /* |
33 | * 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 |
34 | */ |
39 | */ |
35 | extern int write_pidfile (void); |
40 | extern int write_pidfile (void); |
36 | |
41 | |
37 | /* |
42 | /* |
38 | * kill older vped |
43 | * kill older gvpe |
39 | */ |
44 | */ |
40 | extern int kill_other (int signal); |
45 | extern int kill_other (int signal); |
41 | |
46 | |
42 | /* |
47 | /* |
43 | * Detach from current terminal, write pidfile, kill parent |
48 | * Detach from current terminal, write pidfile, kill parent |
44 | */ |
49 | */ |
45 | extern int detach (int do_detach); |
50 | extern int detach (int do_detach); |
46 | |
|
|
47 | /* |
|
|
48 | * Set all files and paths according to netname |
|
|
49 | */ |
|
|
50 | extern void make_names (void); |
|
|
51 | |
51 | |
52 | /* |
52 | /* |
53 | * check wether the given path is an absolute pathname |
53 | * check wether the given path is an absolute pathname |
54 | */ |
54 | */ |
55 | #define ABSOLUTE_PATH(c) ((c)[0] == '/') |
55 | #define ABSOLUTE_PATH(c) ((c)[0] == '/') |
… | |
… | |
60 | |
60 | |
61 | extern void id2mac (unsigned int id, void *m); |
61 | extern void id2mac (unsigned int id, void *m); |
62 | |
62 | |
63 | #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]) |
64 | |
64 | |
65 | struct sliding_window { |
65 | struct sliding_window |
|
|
66 | { |
66 | u32 v[(WINDOWSIZE + 31) / 32]; |
67 | u32 v[(WINDOWSIZE + 31) / 32]; |
67 | u32 seq; |
68 | u32 seq; |
68 | |
69 | |
69 | void reset (u32 seqno) |
70 | void reset (u32 seqno) |
70 | { |
71 | { |
… | |
… | |
74 | |
75 | |
75 | bool recv_ok (u32 seqno) |
76 | bool recv_ok (u32 seqno) |
76 | { |
77 | { |
77 | if (seqno <= seq - WINDOWSIZE) |
78 | if (seqno <= seq - WINDOWSIZE) |
78 | slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" |
79 | slog (L_ERR, _("received duplicate or outdated packet (received %08lx, expected %08lx)\n" |
79 | "possible replay attack, or just massive packet reordering"), seqno, seq + 1);//D |
80 | "possible replay attack, or just massive packet reordering"), seqno, seq + 1); |
80 | else if (seqno > seq + WINDOWSIZE) |
81 | else if (seqno > seq + WINDOWSIZE * 4) |
81 | slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" |
82 | slog (L_ERR, _("received duplicate or out-of-sync packet (received %08lx, expected %08lx)\n" |
82 | "possible replay attack, or just massive packet loss"), seqno, seq + 1);//D |
83 | "possible replay attack, or just massive packet loss"), seqno, seq + 1); |
83 | else |
84 | else |
84 | { |
85 | { |
85 | while (seqno > seq) |
86 | while (seqno > seq) |
86 | { |
87 | { |
87 | seq++; |
88 | seq++; |
… | |
… | |
96 | u32 s = seqno % WINDOWSIZE; |
97 | u32 s = seqno % WINDOWSIZE; |
97 | u32 *cell = v + (s >> 5); |
98 | u32 *cell = v + (s >> 5); |
98 | u32 mask = 1 << (s & 31); |
99 | u32 mask = 1 << (s & 31); |
99 | |
100 | |
100 | if (*cell & mask) |
101 | if (*cell & mask) |
101 | { |
|
|
102 | slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" |
102 | slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" |
103 | "possible replay attack, or just packet duplication"), seqno, seq + 1);//D |
103 | "possible replay attack, or just packet duplication"), seqno, seq + 1); |
104 | return false; |
|
|
105 | } |
|
|
106 | else |
104 | else |
107 | { |
105 | { |
108 | *cell |= mask; |
106 | *cell |= mask; |
109 | return true; |
107 | return true; |
110 | } |
108 | } |
111 | } |
109 | } |
|
|
110 | |
|
|
111 | return false; |
112 | } |
112 | } |
113 | }; |
113 | }; |
114 | |
114 | |
115 | typedef callback0<const char *> run_script_cb; |
115 | typedef callback<const char * ()> run_script_cb; |
116 | |
116 | |
117 | // run a shell script (or actually an external program). |
117 | // run a shell script (or actually an external program). |
118 | void run_script (const run_script_cb &cb, bool wait); |
118 | bool run_script (const run_script_cb &cb, bool wait); |
119 | |
119 | |
120 | #if ENABLE_HTTP_PROXY |
120 | #if ENABLE_HTTP_PROXY |
121 | u8 *base64_encode (const u8 *data, unsigned int len); |
121 | u8 *base64_encode (const u8 *data, unsigned int len); |
122 | #endif |
122 | #endif |
123 | |
123 | |