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/* |
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util.h -- process management and other utility functions |
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Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
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2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
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2003-2013 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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#ifndef UTIL_H__ |
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#define UTIL_H__ |
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|
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#include <cstring> |
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#include <sys/types.h> |
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|
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#include "gettext.h" |
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|
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#include "slog.h" |
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#include "ev_cpp.h" |
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#include "callback.h" |
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#include "global.h" |
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|
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typedef ev_tstamp tstamp; |
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|
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/* |
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* check for an existing gvpe for this net, and write pid to pidfile |
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*/ |
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extern int write_pidfile (void); |
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|
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/* |
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* kill older gvpe |
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*/ |
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extern int kill_other (int signal); |
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|
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/* |
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* Detach from current terminal, write pidfile, kill parent |
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*/ |
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extern int detach (int do_detach); |
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|
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/* |
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* check wether the given path is an absolute pathname |
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*/ |
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#define ABSOLUTE_PATH(c) ((c)[0] == '/') |
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|
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/*****************************************************************************/ |
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|
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typedef u8 mac[6]; |
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|
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extern void id2mac (unsigned int id, void *m); |
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|
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#define mac2id(p) ((p)[0] & 0x01 ? 0 : ((p)[4] << 8) | (p)[5]) |
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|
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struct sliding_window |
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{ |
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u32 v[(WINDOWSIZE + 31) / 32]; |
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u32 seq; |
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|
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void reset (u32 seqno) |
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{ |
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memset (v, -1, sizeof v); |
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seq = seqno; |
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} |
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|
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// 0 == ok, 1 == far history, 2 == duplicate in-window, 3 == far future |
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int seqno_classify (u32 seqno) |
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{ |
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if (seqno <= seq - WINDOWSIZE) |
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return 1; |
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else if (seqno > seq + WINDOWSIZE * 16) |
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return 3; |
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else |
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{ |
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while (seqno > seq) |
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{ |
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seq++; |
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|
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u32 s = seq % WINDOWSIZE; |
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u32 *cell = v + (s >> 5); |
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u32 mask = 1 << (s & 31); |
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|
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*cell &= ~mask; |
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} |
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|
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u32 s = seqno % WINDOWSIZE; |
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u32 *cell = v + (s >> 5); |
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u32 mask = 1 << (s & 31); |
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|
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if (*cell & mask) |
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return 2; |
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else |
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{ |
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*cell |= mask; |
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return 0; |
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} |
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} |
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} |
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}; |
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|
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typedef callback<const char *()> run_script_cb; |
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|
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// run a shell script (or actually an external program). |
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pid_t run_script (const run_script_cb &cb, bool wait); |
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|
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void hexdump (const char *header, void *data, int len); |
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|
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#if ENABLE_HTTP_PROXY |
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u8 *base64_encode (const u8 *data, unsigned int len); |
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#endif |
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|
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/* always take more or less the same time to compare */ |
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bool slow_memeq (const void *a, const void *b, int len); |
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|
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/*****************************************************************************/ |
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|
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void rand_fill (void *data, int len); |
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|
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template<class T> |
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inline void rand_fill (T &t) |
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{ |
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rand_fill (&t, sizeof (T)); |
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} |
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|
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/*****************************************************************************/ |
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|
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// run work_cb in another thread, call done_cb in main thread when finished |
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// only one work_cb will execute at any one time. |
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void async (callback<void ()> work_cb, callback<void ()> done_cb); |
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|
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#endif |
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|
