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/*
* Copyright (C) 2011 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.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <utils/lexparser.h>
#include <debug.h>
typedef struct private_tnc_t private_tnc_t;
typedef tnccs_manager_t *(*tnc_create_tnccs_manager_t)(void);
typedef imc_manager_t *(*tnc_create_imc_manager_t)(void);
typedef imv_manager_t *(*tnc_create_imv_manager_t)(void);
/**
* Private additions to tnc_t.
*/
struct private_tnc_t {
/**
* Public members of tnc_t.
*/
tnc_t public;
};
/**
* Single instance of tnc_t.
*/
tnc_t *tnc;
/**
* Described in header.
*/
void libtnccs_init(void)
{
private_tnc_t *this;
INIT(this,
.public = {
},
);
tnc = &this->public;
}
/**
* Described in header.
*/
void libtnccs_deinit(void)
{
private_tnc_t *this = (private_tnc_t*)tnc;
free(this);
tnc = NULL;
}
static bool load_imcvs_from_config(char *filename, bool is_imc)
{
bool success = FALSE;
int fd, line_nr = 0;
chunk_t src, line;
struct stat sb;
void *addr;
char *label;
label = is_imc ? "IMC" : "IMV";
DBG1(DBG_TNC, "loading %ss from '%s'", label, 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;
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);
break;
}
/* only interested in IMCs or IMVs depending on label */
if (!match(label, &token))
{
continue;
}
/* advance to the IMC/IMV name and extract it */
if (!extract_token(&token, '"', &line) ||
!extract_token(&token, '"', &line))
{
DBG1(DBG_TNC, "line %d: %s name must be set in double quotes",
line_nr, label);
break;
}
/* copy the IMC/IMV name */
name = malloc(token.len + 1);
memcpy(name, token.ptr, token.len);
name[token.len] = '\0';
/* advance to the IMC/IMV path and extract it */
if (!eat_whitespace(&line))
{
DBG1(DBG_TNC, "line %d: %s path is missing", line_nr, label);
free(name);
break;
}
if (!extract_token(&token, ' ', &line))
{
token = line;
}
/* copy the IMC/IMV path */
path = malloc(token.len + 1);
memcpy(path, token.ptr, token.len);
path[token.len] = '\0';
/* load and register an IMC/IMV instance */
if (is_imc)
{
success = tnc->imcs->load(tnc->imcs, name, path);
}
else
{
success = tnc->imvs->load(tnc->imvs, name, path);
}
if (!success)
{
break;
}
}
munmap(addr, sb.st_size);
close(fd);
return success;
}
/**
* Described in header.
*/
bool tnc_manager_register(plugin_t *plugin, plugin_feature_t *feature,
bool reg, void *data)
{
bool load_imcvs = FALSE;
bool is_imc = FALSE;
if (feature->type == FEATURE_CUSTOM)
{
if (streq(feature->arg.custom, "tnccs-manager"))
{
if (reg)
{
tnc->tnccs = ((tnc_create_tnccs_manager_t)data)();
}
else
{
tnc->tnccs->destroy(tnc->tnccs);
tnc->tnccs = NULL;
}
}
else if (streq(feature->arg.custom, "imc-manager"))
{
if (reg)
{
tnc->imcs = ((tnc_create_imc_manager_t)data)();
is_imc = TRUE;
load_imcvs = TRUE;
}
else
{
tnc->imcs->destroy(tnc->imcs);
tnc->imcs = NULL;
}
}
else if (streq(feature->arg.custom, "imv-manager"))
{
if (reg)
{
tnc->imvs = ((tnc_create_imv_manager_t)data)();
is_imc = FALSE;
load_imcvs = TRUE;
}
else
{
tnc->imvs->destroy(tnc->imvs);
tnc->imvs = NULL;
}
}
else
{
return FALSE;
}
if (load_imcvs)
{
char *tnc_config;
tnc_config = lib->settings->get_str(lib->settings,
"libtnccs.tnc_config", "/etc/tnc_config");
if (!load_imcvs_from_config(tnc_config, is_imc))
{
if (is_imc)
{
tnc->imcs->destroy(tnc->imcs);
tnc->imcs = NULL;
}
else
{
tnc->imvs->destroy(tnc->imvs);
tnc->imvs = NULL;
}
return FALSE;
}
}
}
return TRUE;
}
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