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/*
* Copyright (C) 2010 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "tnc_imc_plugin.h"
#include "tnc_imc_manager.h"
#include "tnc_imc.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <daemon.h>
#include <utils/lexparser.h>
/**
* load IMCs from a configuration file
*/
static bool load_imcs(char *filename)
{
int fd, line_nr = 0;
chunk_t src, line;
struct stat sb;
void *addr;
DBG1(DBG_TNC, "loading IMCs from '%s'", filename);
fd = open(filename, O_RDONLY);
if (fd == -1)
{
DBG1(DBG_TNC, "opening configuration file '%s' failed: %s", filename,
strerror(errno));
return FALSE;
}
if (fstat(fd, &sb) == -1)
{
DBG1(DBG_LIB, "getting file size of '%s' failed: %s", filename,
strerror(errno));
close(fd);
return FALSE;
}
addr = mmap(NULL, sb.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if (addr == MAP_FAILED)
{
DBG1(DBG_LIB, "mapping '%s' failed: %s", filename, strerror(errno));
close(fd);
return FALSE;
}
src = chunk_create(addr, sb.st_size);
while (fetchline(&src, &line))
{
char *name, *path;
chunk_t token;
imc_t *imc;
line_nr++;
/* skip comments or empty lines */
if (*line.ptr == '#' || !eat_whitespace(&line))
{
continue;
}
/* determine keyword */
if (!extract_token(&token, ' ', &line))
{
DBG1(DBG_TNC, "line %d: keyword must be followed by a space",
line_nr);
return FALSE;
}
/* only interested in IMCs */
if (!match("IMC", &token))
{
continue;
}
/* advance to the IMC name and extract it */
if (!extract_token(&token, '"', &line) ||
!extract_token(&token, '"', &line))
{
DBG1(DBG_TNC, "line %d: IMC name must be set in double quotes",
line_nr);
return FALSE;
}
/* copy the IMC name */
name = malloc(token.len + 1);
memcpy(name, token.ptr, token.len);
name[token.len] = '\0';
/* advance to the IMC path and extract it */
if (!eat_whitespace(&line))
{
DBG1(DBG_TNC, "line %d: IMC path is missing", line_nr);
free(name);
return FALSE;
}
if (!extract_token(&token, ' ', &line))
{
token = line;
}
/* copy the IMC path */
path = malloc(token.len + 1);
memcpy(path, token.ptr, token.len);
path[token.len] = '\0';
/* load and register IMC instance */
imc = tnc_imc_create(name, path);
if (!imc)
{
free(name);
free(path);
return FALSE;
}
if (!charon->imcs->add(charon->imcs, imc))
{
imc->destroy(imc);
return FALSE;
}
DBG1(DBG_TNC, "IMC %u \"%s\" loaded from '%s'", imc->get_id(imc),
name, path);
}
munmap(addr, sb.st_size);
close(fd);
return TRUE;
}
METHOD(plugin_t, destroy, void,
tnc_imc_plugin_t *this)
{
charon->imcs->destroy(charon->imcs);
free(this);
}
/*
* see header file
*/
plugin_t *tnc_imc_plugin_create()
{
char *tnc_config;
tnc_imc_plugin_t *this;
INIT(this,
.plugin = {
.destroy = _destroy,
},
);
/* Create IMC manager */
charon->imcs = tnc_imc_manager_create();
/* Load IMCs and abort if not all instances initalize successfully */
tnc_config = lib->settings->get_str(lib->settings,
"charon.plugins.tnc-imc.tnc_config", "/etc/tnc_config");
if (!load_imcs(tnc_config))
{
charon->imcs->destroy(charon->imcs);
free(this);
return NULL;
}
return &this->plugin;
}
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