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/*
* Copyright (C) 2012 Giuliano Grassi
* Copyright (C) 2012 Ralf Sager
* Copyright (C) 2012 Tobias Brunner
* 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 <signal.h>
#include <string.h>
#include <android/log.h>
#include "charonservice.h"
#include "android_jni.h"
#include "kernel/android_ipsec.h"
#include "kernel/android_net.h"
#include <daemon.h>
#include <hydra.h>
#include <ipsec.h>
#include <library.h>
#include <threading/thread.h>
#define ANDROID_DEBUG_LEVEL 1
typedef struct private_charonservice_t private_charonservice_t;
/**
* private data of charonservice
*/
struct private_charonservice_t {
/**
* public interface
*/
charonservice_t public;
/**
* CharonVpnService reference
*/
jobject vpn_service;
};
/**
* Single instance of charonservice_t.
*/
charonservice_t *charonservice;
/**
* hook in library for debugging messages
*/
extern void (*dbg)(debug_t group, level_t level, char *fmt, ...);
/**
* Logging hook for library logs, using android specific logging
*/
static void dbg_android(debug_t group, level_t level, char *fmt, ...)
{
va_list args;
if (level <= ANDROID_DEBUG_LEVEL)
{
char sgroup[16], buffer[8192];
char *current = buffer, *next;
snprintf(sgroup, sizeof(sgroup), "%N", debug_names, group);
va_start(args, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
while (current)
{ /* log each line separately */
next = strchr(current, '\n');
if (next)
{
*(next++) = '\0';
}
__android_log_print(ANDROID_LOG_INFO, "charon", "00[%s] %s\n",
sgroup, current);
current = next;
}
}
}
METHOD(charonservice_t, bypass_socket, bool,
private_charonservice_t *this, int fd, int family)
{
JNIEnv *env;
jmethodID method_id;
androidjni_attach_thread(&env);
method_id = (*env)->GetMethodID(env, android_charonvpnservice_class,
"protect", "(I)Z");
if (!method_id)
{
goto failed;
}
if (!(*env)->CallBooleanMethod(env, this->vpn_service, method_id, fd))
{
DBG1(DBG_CFG, "VpnService.protect() failed");
goto failed;
}
androidjni_detach_thread();
return TRUE;
failed:
androidjni_exception_occurred(env);
androidjni_detach_thread();
return FALSE;
}
/**
* Initialize the charonservice object
*/
static void charonservice_init(JNIEnv *env, jobject service)
{
private_charonservice_t *this;
static plugin_feature_t features[] = {
PLUGIN_CALLBACK(kernel_net_register, kernel_android_net_create),
PLUGIN_PROVIDE(CUSTOM, "kernel-net"),
PLUGIN_CALLBACK(kernel_ipsec_register, kernel_android_ipsec_create),
PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
};
INIT(this,
.public = {
.bypass_socket = _bypass_socket,
},
.vpn_service = (*env)->NewGlobalRef(env, service),
);
charonservice = &this->public;
lib->plugins->add_static_features(lib->plugins, "androidbridge", features,
countof(features), TRUE);
lib->settings->set_int(lib->settings,
"charon.plugins.android_log.loglevel", ANDROID_DEBUG_LEVEL);
}
/**
* Deinitialize the charonservice object
*/
static void charonservice_deinit(JNIEnv *env)
{
private_charonservice_t *this = (private_charonservice_t*)charonservice;
(*env)->DeleteGlobalRef(env, this->vpn_service);
free(this);
charonservice = NULL;
}
/**
* Handle SIGSEGV/SIGILL signals raised by threads
*/
static void segv_handler(int signal)
{
dbg_android(DBG_DMN, 1, "thread %u received %d", thread_current_id(),
signal);
exit(1);
}
/**
* Initialize charon and the libraries via JNI
*/
JNI_METHOD(CharonVpnService, initializeCharon, void)
{
struct sigaction action;
/* logging for library during initialization, as we have no bus yet */
dbg = dbg_android;
/* initialize library */
if (!library_init(NULL))
{
library_deinit();
return;
}
if (!libhydra_init("charon"))
{
libhydra_deinit();
library_deinit();
return;
}
if (!libipsec_init())
{
libipsec_deinit();
libhydra_deinit();
library_deinit();
return;
}
charonservice_init(env, this);
if (!libcharon_init("charon") ||
!charon->initialize(charon, PLUGINS))
{
libcharon_deinit();
charonservice_deinit(env);
libipsec_deinit();
libhydra_deinit();
library_deinit();
return;
}
/* add handler for SEGV and ILL etc. */
action.sa_handler = segv_handler;
action.sa_flags = 0;
sigemptyset(&action.sa_mask);
sigaction(SIGSEGV, &action, NULL);
sigaction(SIGILL, &action, NULL);
sigaction(SIGBUS, &action, NULL);
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
/* start daemon (i.e. the threads in the thread-pool) */
charon->start(charon);
}
/**
* Deinitialize charon and all libraries
*/
JNI_METHOD(CharonVpnService, deinitializeCharon, void)
{
libcharon_deinit();
charonservice_deinit(env);
libipsec_deinit();
libhydra_deinit();
library_deinit();
}
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