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/*
* (C) 2000-2006 by the netfilter coreteam <coreteam@netfilter.org>:
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <iptables_common.h>
#include <xtables.h>
#ifndef PROC_SYS_MODPROBE
#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
#endif
/* the path to command to load kernel module */
const char *modprobe = NULL;
void *fw_calloc(size_t count, size_t size)
{
void *p;
if ((p = calloc(count, size)) == NULL) {
perror("ip[6]tables: calloc failed");
exit(1);
}
return p;
}
void *fw_malloc(size_t size)
{
void *p;
if ((p = malloc(size)) == NULL) {
perror("ip[6]tables: malloc failed");
exit(1);
}
return p;
}
static char *get_modprobe(void)
{
int procfile;
char *ret;
#define PROCFILE_BUFSIZ 1024
procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
if (procfile < 0)
return NULL;
ret = (char *) malloc(PROCFILE_BUFSIZ);
if (ret) {
memset(ret, 0, PROCFILE_BUFSIZ);
switch (read(procfile, ret, PROCFILE_BUFSIZ)) {
case -1: goto fail;
case PROCFILE_BUFSIZ: goto fail; /* Partial read. Wierd */
}
if (ret[strlen(ret)-1]=='\n')
ret[strlen(ret)-1]=0;
close(procfile);
return ret;
}
fail:
free(ret);
close(procfile);
return NULL;
}
int xtables_insmod(const char *modname, const char *modprobe, int quiet)
{
char *buf = NULL;
char *argv[4];
int status;
/* If they don't explicitly set it, read out of kernel */
if (!modprobe) {
buf = get_modprobe();
if (!buf)
return -1;
modprobe = buf;
}
switch (fork()) {
case 0:
argv[0] = (char *)modprobe;
argv[1] = (char *)modname;
if (quiet) {
argv[2] = "-q";
argv[3] = NULL;
} else {
argv[2] = NULL;
argv[3] = NULL;
}
execv(argv[0], argv);
/* not usually reached */
exit(1);
case -1:
return -1;
default: /* parent */
wait(&status);
}
free(buf);
if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
return 0;
return -1;
}
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