init

.gitignore

@@ -0,0 +1,4 @@
+*.o
+*.d
+cachesyncd
+cachesyncd.log

AUTHORS

@@ -0,0 +1 @@
+Olaf Rempel <razzor@kopf-tisch.de>

COPYING

@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

Makefile

@@ -0,0 +1,22 @@
+# Toplevel Makefile
+
+SRC := cachesyncd.c configfile.c logging.c multicast.c unixsock.c
+CFLAGS := -O2 -Wall
+
+# ############################
+
+all: cachesyncd
+
+cachesyncd: $(SRC:%.c=%.o)
+	$(CC) $(LDFLAGS) $^ -o $@
+
+%.d: %.c
+	$(CC) $(CFLAGS) -MM -c $< -o $@
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+	rm -rf *.d *.o cachesyncd
+
+-include $(SRC:.c=.d)

cachesyncd.c

@@ -0,0 +1,111 @@
+/***************************************************************************
+ *   Copyright (C) 06/2006 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <sys/stat.h>
+
+#include "configfile.h"
+#include "logging.h"
+#include "multicast.h"
+#include "unixsock.h"
+
+#define DEFAULT_CONFIG "cachesyncd.conf"
+#define DEFAULT_LOGFILE "cachesyncd.log"
+
+static struct option opts[] = {
+	{"config",	1, 0, 'c'},
+	{"debug",	0, 0, 'd'},
+	{"help",	0, 0, 'h'},
+	{0, 0, 0, 0}
+};
+
+static void run()
+{
+	int usock, msock;
+	usock = sock_init();
+	msock = mcast_init();
+
+	mcast_send(msock, "HALLO", 6);
+
+	msock_close(msock);
+	sock_close(usock);
+}
+
+int main(int argc, char *argv[])
+{
+	char *config = DEFAULT_CONFIG;
+	int code, arg = 0, debug = 0;
+
+	do {
+		code = getopt_long(argc, argv, "c:dh", opts, &arg);
+
+		switch (code) {
+		case 'c':	/* config */
+				config = optarg;
+				break;
+
+		case 'd':	/* debug */
+				debug = 1;
+				break;
+
+		case 'h':	/* help */
+				printf("Usage: cachesyncd [options]\n"
+					"Options: \n"
+					"  --config       -c  configfile  use this configfile\n"
+					"  --debug        -d              do not fork and log to stderr\n"
+					"  --help         -h              this help\n"
+					"\n");
+				exit(0);
+				break;
+
+		case '?':	/* error */
+				exit(-1);
+				break;
+
+		default:	/* unknown / all options parsed */
+				break;
+		}
+	} while (code != -1);
+
+	/* parse config file */
+	if (!config_parse(config))
+		exit(-1);
+
+	/* check logfile */
+	char *logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
+	if (logfile != NULL && debug == 0) {
+		/* start logging */
+		if (!log_init(logfile))
+			exit(-1);
+
+		/* zum daemon mutieren */
+		daemon(-1, 0);
+	}
+
+	log_print(LOG_EVERYTIME, "cachesyncd started");
+
+	run();
+
+	return 0;
+}

cachesyncd.conf

@@ -0,0 +1,17 @@
+[global]
+# unpriviliged user
+user httpd
+
+# pidfile location
+pidfile ./cachesync.pid
+
+# unix domain socket location
+socket ./cachesync.sock
+
+# bind to multicast interface
+mcastdev eth0
+mcastgroup 224.0.0.1
+mcastport 2000
+
+# smarty cache directory
+basedir /var/www/smarty/cache/

configfile.c

@@ -0,0 +1,182 @@
+/***************************************************************************
+ *   Copyright (C) 06/2006 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "list.h"
+
+#include "configfile.h"
+#include "logging.h"
+
+static LIST_HEAD(config_list);
+
+static struct conf_section * config_add_section(char *name)
+{
+	struct conf_section *section;
+
+	if (!name)
+		return NULL;
+
+	section = malloc(sizeof(struct conf_section));
+	if (section) {
+		INIT_LIST_HEAD(&section->list);
+		INIT_LIST_HEAD(&section->tupel);
+
+		strncpy(section->name, name, sizeof(section->name));
+		list_add_tail(&section->list, &config_list);
+	}
+	return section;
+}
+
+static int config_add_tupel(struct conf_section *section, char *option, char *parameter)
+{
+	struct conf_tupel *tupel;
+
+	if (!section || !option || !parameter)
+		return 0;
+
+	if (!(tupel = malloc(sizeof(struct conf_tupel))))
+		return 0;
+
+	INIT_LIST_HEAD(&tupel->list);
+
+	tupel->option = strdup(option);
+	tupel->parameter = strdup(parameter);
+
+	list_add_tail(&tupel->list, &section->tupel);
+	return 1;
+}
+
+static void config_free(void)
+{
+	struct conf_section *section, *section_tmp;
+	struct conf_tupel *tupel, *tupel_tmp;
+
+	list_for_each_entry_safe(section, section_tmp, &config_list, list) {
+		list_for_each_entry_safe(tupel, tupel_tmp, &section->tupel, list) {
+			list_del(&tupel->list);
+			free(tupel->option);
+			free(tupel->parameter);
+			free(tupel);
+		}
+		list_del(&section->list);
+		free(section);
+	}
+}
+
+int config_parse(char *config)
+{
+	struct conf_section *section = NULL;
+	FILE *fz;
+	int i = 0, ret = 1;
+	char *row, *tok, *tok2;
+
+	if (!config)
+		return 0;
+
+	if (!(row = malloc(1024)))
+		return 0;
+
+	if (!(fz = fopen(config, "r"))) {
+		log_print(LOG_ERROR, "config_parse(): %s", config);
+		return 0;
+	}
+
+	while (fgets(row, 1024, fz)) {
+		i++;
+
+		if (row[0] == '#' || row[0] <= ' ') {
+			continue;
+
+		} else if (row[0] == '[') {
+			tok = strtok(row +1, " ]\n");
+			section = config_add_section(tok);
+			if (!section) {
+				log_print(LOG_WARN, "config_parse(): invalid section in row %d", i);
+				ret = 0;
+				break;
+			}
+			continue;
+
+		} else if (!section) {
+			log_print(LOG_WARN, "config_parse(): missing section in row %d", i);
+			ret = 0;
+			break;
+		}
+
+		if ((tok = strtok(row, " \n")) && (tok2 = strtok(NULL, " \n")))
+			if (!config_add_tupel(section, tok, tok2))
+				log_print(LOG_WARN, "config_parse(): invalid row %d", i);
+	}
+
+	fclose(fz);
+	free(row);
+
+	if (atexit(config_free) != 0) {
+		log_print(LOG_ERROR, "config_parse(): atexit()");
+		return 0;
+	}
+
+	return ret;
+}
+
+struct conf_section * config_get_section(char *name)
+{
+	struct conf_section *section;
+
+	list_for_each_entry(section, &config_list, list) {
+		if (!strcmp(section->name, name))
+			return section;
+	}
+	return NULL;
+}
+
+char * config_get_parameter(struct conf_section *section, char *option)
+{
+	struct conf_tupel *tupel;
+
+	list_for_each_entry(tupel, &section->tupel, list) {
+		if (!strcmp(tupel->option, option))
+			return tupel->parameter;
+	}
+	return NULL;
+}
+
+char * config_get_string(char *section, char *option, char *def)
+{
+	struct conf_section *tmp;
+	char *ret;
+
+	tmp = config_get_section(section);
+	if (tmp && (ret = config_get_parameter(tmp, option)))
+		return ret;
+
+	return def;
+}
+
+int config_get_int(char *section, char *option, int def)
+{
+	char *ret;
+
+	ret = config_get_string(section, option, NULL);
+	return ret ? atoi(ret) : def;
+}

configfile.h

@@ -0,0 +1,24 @@
+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+#include "list.h"
+
+struct conf_section {
+	struct list_head list;
+	char name[32];
+	struct list_head tupel;
+};
+
+struct conf_tupel {
+	struct list_head list;
+	char *option;
+	char *parameter;
+};
+
+int config_parse(char *config);
+struct conf_section * config_get_section(char *name);
+char * config_get_parameter(struct conf_section *section, char *option);
+char * config_get_string(char *section, char *option, char *def);
+int config_get_int(char *section, char *option, int def);
+
+#endif /* _CONFIG_H_ */

list.h

@@ -0,0 +1,268 @@
+#ifndef _LIST_H_
+#define _LIST_H_
+
+/*
+ * stolen from linux kernel 2.6.11 (http://kernel.org/)
+ * linux/include/linux/stddef.h (offsetoff)
+ * linux/include/linux/kernel.h (container_of)
+ * linux/include/linux/list.h (*list*)
+ * linux/include/linux/netfilter_ipv4/listhelp.h (LIST_FIND)
+ *
+ * modified by Olaf Rempel <razzor@kopf-tisch.de>
+ */
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+#define container_of(ptr, type, member) ({ \
+		const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+		(type *)( (char *)__mptr - offsetof(type,member) );})
+
+struct list_head {
+	struct list_head *next, *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+	struct list_head name = LIST_HEAD_INIT(name)
+
+#define INIT_LIST_HEAD(ptr) do { \
+	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
+} while (0)
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_add(struct list_head *new,
+			      struct list_head *prev,
+			      struct list_head *next)
+{
+	next->prev = new;
+	new->next = next;
+	new->prev = prev;
+	prev->next = new;
+}
+
+/*
+ * list_add - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it after
+ *
+ * Insert a new entry after the specified head.
+ * This is good for implementing stacks.
+ */
+static inline void list_add(struct list_head *new, struct list_head *head)
+{
+	__list_add(new, head, head->next);
+}
+
+/*
+ * list_add_tail - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+static inline void list_add_tail(struct list_head *new, struct list_head *head)
+{
+	__list_add(new, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head * prev, struct list_head * next)
+{
+	next->prev = prev;
+	prev->next = next;
+}
+
+/*
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	entry->next = NULL;
+	entry->prev = NULL;
+}
+
+/*
+ * list_del_init - deletes entry from list and reinitialize it.
+ * entry: the element to delete from the list.
+ */
+static inline void list_del_init(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	INIT_LIST_HEAD(entry);
+}
+
+/*
+ * list_move - delete from one list and add as another's head
+ * @list: the entry to move
+ * @head: the head that will precede our entry
+ */
+static inline void list_move(struct list_head *list, struct list_head *head)
+{
+        __list_del(list->prev, list->next);
+        list_add(list, head);
+}
+
+/*
+ * list_move_tail - delete from one list and add as another's tail
+ * @list: the entry to move
+ * @head: the head that will follow our entry
+ */
+static inline void list_move_tail(struct list_head *list,
+				  struct list_head *head)
+{
+        __list_del(list->prev, list->next);
+        list_add_tail(list, head);
+}
+
+/*
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+	return head->next == head;
+}
+
+static inline void __list_splice(struct list_head *list,
+				 struct list_head *head)
+{
+	struct list_head *first = list->next;
+	struct list_head *last = list->prev;
+	struct list_head *at = head->next;
+
+	first->prev = head;
+	head->next = first;
+
+	last->next = at;
+	at->prev = last;
+}
+
+/*
+ * list_splice - join two lists
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ */
+static inline void list_splice(struct list_head *list, struct list_head *head)
+{
+	if (!list_empty(list))
+		__list_splice(list, head);
+}
+
+/*
+ * list_splice_init - join two lists and reinitialise the emptied list.
+ * @list: the new list to add.
+ * @head: the place to add it in the first list.
+ *
+ * The list at @list is reinitialised
+ */
+static inline void list_splice_init(struct list_head *list,
+				    struct list_head *head)
+{
+	if (!list_empty(list)) {
+		__list_splice(list, head);
+		INIT_LIST_HEAD(list);
+	}
+}
+
+/*
+ * list_entry - get the struct for this entry
+ * @ptr:	the &struct list_head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_entry(ptr, type, member) \
+	container_of(ptr, type, member)
+
+/*
+ * list_for_each	-	iterate over a list
+ * @pos:	the &struct list_head to use as a loop counter.
+ * @head:	the head for your list.
+ */
+#define list_for_each(pos, head) \
+	for (pos = (head)->next; pos != (head); pos = pos->next)
+
+/*
+ * list_for_each_prev	-	iterate over a list backwards
+ * @pos:	the &struct list_head to use as a loop counter.
+ * @head:	the head for your list.
+ */
+#define list_for_each_prev(pos, head) \
+	for (pos = (head)->prev; pos != (head); pos = pos->prev)
+
+/*
+ * list_for_each_safe	-	iterate over a list safe against removal of list entry
+ * @pos:	the &struct list_head to use as a loop counter.
+ * @n:		another &struct list_head to use as temporary storage
+ * @head:	the head for your list.
+ */
+#define list_for_each_safe(pos, n, head) \
+	for (pos = (head)->next, n = pos->next; pos != (head); \
+		pos = n, n = pos->next)
+
+/*
+ * list_for_each_entry	-	iterate over list of given type
+ * @pos:	the type * to use as a loop counter.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry(pos, head, member)				\
+	for (pos = list_entry((head)->next, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/*
+ * list_for_each_entry_reverse - iterate backwards over list of given type.
+ * @pos:	the type * to use as a loop counter.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_reverse(pos, head, member)			\
+	for (pos = list_entry((head)->prev, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = list_entry(pos->member.prev, typeof(*pos), member))
+
+/*
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:	the type * to use as a loop counter.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		n = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+
+/* Return pointer to first true entry, if any, or NULL.  A macro
+   required to allow inlining of cmpfn. */
+#define LIST_FIND(head, cmpfn, type, args...)           \
+({                                                      \
+        const struct list_head *__i, *__j = NULL;       \
+                                                        \
+        list_for_each(__i, (head))                      \
+                if (cmpfn((const type)__i , ## args)) { \
+                        __j = __i;                      \
+                        break;                          \
+                }                                       \
+        (type)__j;                                      \
+})
+
+#endif /* _LIST_H_ */

logging.c

@@ -0,0 +1,103 @@
+/***************************************************************************
+ *   Copyright (C) 06/2006 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <string.h>
+
+#include "logging.h"
+
+#define BUFSIZE 8192
+
+static FILE *log_fd = NULL;
+static char *buffer = NULL;
+
+void log_print(int prio, const char *fmt, ...)
+{
+	va_list az;
+	int len;
+
+	if (buffer == NULL) {
+		buffer = malloc(BUFSIZE);
+		if (buffer == NULL) {
+			fprintf(stderr, "log_print: out of memory\nBailing out!\n");
+			exit(-1);
+		}
+	}
+
+	va_start(az, fmt);
+	len = vsnprintf(buffer, BUFSIZE, fmt, az);
+	va_end(az);
+
+	if (len < 0 || len >= BUFSIZE) {
+		log_print(LOG_ERROR, "log_print: arguments too long");
+		errno = 0;
+		return;
+	}
+
+	if (errno) {
+		strncpy(buffer + len, ": ", BUFSIZE - len);
+		len += 2;
+		strncpy(buffer + len, strerror(errno), BUFSIZE - len);
+	}
+
+	if (log_fd) {
+		char    tbuf[64];
+		time_t  tzgr;
+
+		time(&tzgr);
+		strftime(tbuf, sizeof(tbuf), "%b %d %H:%M:%S :", localtime(&tzgr));
+
+		fprintf(log_fd, "%s %s\n", tbuf, buffer);
+		fflush(log_fd);
+
+	} else {
+		fprintf(stderr, "%s\n", buffer);
+	}
+
+	errno = 0;
+}
+
+static void log_close(void)
+{
+	if (buffer)
+		free(buffer);
+
+	fclose(log_fd);
+}
+
+int log_init(char *logfile)
+{
+	log_fd = fopen(logfile, "a");
+	if (log_fd == NULL) {
+		log_print(LOG_ERROR, "log_open('%s'): %s", logfile);
+		return 0;
+	}
+
+	if (atexit(log_close) != 0) {
+		log_print(LOG_ERROR, "log_open(): atexit()");
+		return 0;
+	}
+
+	log_print(LOG_EVERYTIME, "==========================");
+	return 1;
+}

logging.h

@@ -0,0 +1,16 @@
+#ifndef _LOGGING_H_
+#define _LOGGING_H_
+
+#define LOG_DEBUG 5
+#define LOG_INFO  4
+#define LOG_NOTICE 3
+#define LOG_WARN 2
+#define LOG_ERROR 1
+#define LOG_CRIT 0
+
+#define LOG_EVERYTIME 0
+
+int log_init(char *logfile);
+void log_print(int prio, const char *fmt, ... );
+
+#endif /* _LOGGING_H_ */

multicast.c

@@ -0,0 +1,117 @@
+/***************************************************************************
+ *   Copyright (C) 06/2006 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <unistd.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "configfile.h"
+#include "logging.h"
+
+static struct sockaddr_in dest_addr;
+
+int mcast_init()
+{
+	struct ip_mreq multiaddr;
+	struct ifreq ifr;
+	char *mcastdev, *mcastgroup;
+	int mcastport, sock;
+
+	// open socket
+	sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock == -1) {
+		log_print(LOG_ERROR, "mcast_init: socket()");
+		return -1;
+	}
+
+	// get device flags
+	mcastdev = config_get_string("global", "mcastdev", "eth0");
+	strncpy(ifr.ifr_name, mcastdev, sizeof(ifr.ifr_name));
+	if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
+		log_print(LOG_WARN, "mcast_init: ioctl(SIOCGIFFLAGS)");
+		close(sock);
+		return -1;
+	}
+
+	// check device flags
+	if ((ifr.ifr_flags & (IFF_UP | IFF_MULTICAST)) != (IFF_UP | IFF_MULTICAST)) {
+		log_print(LOG_WARN, "mcast_init: device %s not up");
+		close(sock);
+		return -1;
+	}
+
+	if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, ifr.ifr_name, sizeof(ifr.ifr_name)) < 0) {
+		log_print(LOG_WARN, "mcast_init: setsockopt(SO_BINDTODEVICE)");
+//		close(sock);
+//		return -1;
+	}
+
+	mcastgroup = config_get_string("global", "mcastgroup", "224.0.0.1");
+	mcastport = config_get_int("global", "mcastport", 2000);
+
+	dest_addr.sin_family = AF_INET;
+	inet_aton(mcastgroup, &dest_addr.sin_addr);
+	dest_addr.sin_port = htons(mcastport);
+
+	if (bind(sock, (struct sockaddr*)&dest_addr, sizeof(dest_addr)) < 0) {
+		log_print(LOG_WARN, "mcast_init: bind()");
+		return -1;
+	}
+
+	// get interface address
+	if (ioctl(sock, SIOCGIFADDR, &ifr) != 0) {
+		log_print(LOG_WARN, "mcast_init: ioctl(SIOCGIFADDR)");
+		close(sock);
+		return -1;
+	}
+
+	// check address family
+	if (ifr.ifr_addr.sa_family != AF_INET) {
+		log_print(LOG_WARN, "mcast_init: unknown address family");
+		close(sock);
+		return -1;
+	}
+
+	inet_aton(mcastgroup, &multiaddr.imr_multiaddr);
+	multiaddr.imr_interface.s_addr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
+
+	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+			&multiaddr, sizeof(multiaddr)) == -1) {
+		log_print(LOG_WARN, "mcast_init: setsockopt(IP_ADD_MEMBERSHIP)");
+		close(sock);
+		return -1;
+	}
+
+	return sock;
+}
+
+int mcast_send(int sock, char *buf, int len)
+{
+	return sendto(sock, buf, len, MSG_NOSIGNAL, (const struct sockaddr*)&dest_addr, sizeof(dest_addr));
+}
+
+void msock_close(int sock)
+{
+	close(sock);
+}

multicast.h

@@ -0,0 +1,10 @@
+#ifndef _MULTICAST_H_
+#define _MULTICAST_H_
+
+int mcast_init();
+
+int mcast_send(int sock, char *buf, int len);
+
+void msock_close(int sock);
+
+#endif // _MULTICAST_H_

unixsock.c

@@ -0,0 +1,74 @@
+/***************************************************************************
+ *   Copyright (C) 06/2006 by Olaf Rempel                                  *
+ *   razzor@kopf-tisch.de                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+
+#include "configfile.h"
+#include "logging.h"
+
+#define DEFAULT_SOCKET "/tmp/cachesyncd"
+
+int sock_init()
+{
+	struct sockaddr_un addr;
+	char *filename;
+	mode_t old_umask;
+	int sockfd, len, status;
+
+	sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (sockfd == -1) {
+		log_print(LOG_ERROR, "unixsock: socket()");
+		return -1;
+	}
+
+	filename = config_get_string("global", "socket", DEFAULT_SOCKET);
+
+	addr.sun_family = AF_UNIX;
+	strncpy(addr.sun_path, filename, sizeof(addr.sun_path));
+	len = sizeof(addr.sun_family) + strlen(addr.sun_path);
+
+	old_umask = umask(0077);
+	status = bind(sockfd, (struct sockaddr *) &addr, len);
+	umask(old_umask);
+
+	if (status == -1) {
+		log_print(LOG_ERROR, "unixsock: bind()");
+		return -1;
+	}
+
+	return sockfd;
+}
+
+void sock_close(int sockfd)
+{
+	char *filename;
+	int status;
+
+	close(sockfd);
+
+	filename = config_get_string("global", "socket", DEFAULT_SOCKET);
+	status = unlink(filename);
+	if (status == -1)
+		log_print(LOG_WARN, "unixsock: unlink()");
+}

unixsock.h

@@ -0,0 +1,7 @@
+#ifndef _UNIXSOCK_H_
+#define _UNIXSOCK_H_
+
+int sock_init();
+void sock_close(int sockfd);
+
+#endif // _UNIXSOCK_H_