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Olaf Rempel 2006-06-23 22:02:31 +02:00
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*.o
*.d
cachesyncd
cachesyncd.log

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Olaf Rempel <razzor@kopf-tisch.de>

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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
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To protect your rights, we need to make restrictions that forbid
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We protect your rights with two steps: (1) copyright the software, and
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The precise terms and conditions for copying, distribution and
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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
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Whether that is true depends on what the Program does.
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and give any other recipients of the Program a copy of this License
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the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
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In addition, mere aggregation of another work not based on the Program
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This section is intended to make thoroughly clear what is believed to
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NO WARRANTY
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FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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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.

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# 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)

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/***************************************************************************
* 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;
}

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[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/

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/***************************************************************************
* 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;
}

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#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_ */

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#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_ */

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/***************************************************************************
* 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;
}

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#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_ */

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/***************************************************************************
* 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);
}

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#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_

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/***************************************************************************
* 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()");
}

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#ifndef _UNIXSOCK_H_
#define _UNIXSOCK_H_
int sock_init();
void sock_close(int sockfd);
#endif // _UNIXSOCK_H_