tor-android/external/badvpn_dns/ncd/emncd.c

138 lines
4.2 KiB
C

/**
* @file emncd.c
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <string.h>
#include <misc/version.h>
#include <misc/debug.h>
#include <base/BLog.h>
#include <system/BTime.h>
#include <system/BReactor.h>
#include <ncd/NCDInterpreter.h>
#include <ncd/NCDConfigParser.h>
#include <generated/blog_channel_ncd.h>
static BReactor reactor;
static int running;
static NCDInterpreter interpreter;
static void interpreter_handler_finished (void *user, int exit_code)
{
ASSERT(running)
fprintf(stderr, "--- interpreter terminated ---\n");
NCDInterpreter_Free(&interpreter);
running = 0;
}
__attribute__((used))
int main ()
{
BLog_InitStderr();
fprintf(stderr, "--- initializing emncd version "GLOBAL_VERSION" ---\n");
BTime_Init();
BReactor_EmscriptenInit(&reactor);
running = 0;
return 0;
}
__attribute__((used))
void emncd_start (const char *program_text, int loglevel)
{
ASSERT(program_text);
ASSERT(loglevel >= 0);
ASSERT(loglevel <= BLOG_DEBUG);
if (running) {
fprintf(stderr, "--- cannot start, interpreter is already running! ---\n");
return;
}
for (int i = 0; i < BLOG_NUM_CHANNELS; i++) {
BLog_SetChannelLoglevel(i, loglevel);
}
// parse program
NCDProgram program;
if (!NCDConfigParser_Parse((char *)program_text ,strlen(program_text), &program)) {
fprintf(stderr, "--- error: failed to parse the program ---\n");
return;
}
// include commands are not implemented currently
if (NCDProgram_ContainsElemType(&program, NCDPROGRAMELEM_INCLUDE) || NCDProgram_ContainsElemType(&program, NCDPROGRAMELEM_INCLUDE_GUARD)) {
fprintf(stderr, "--- error: include mechanism is not supported in emncd ---\n");
NCDProgram_Free(&program);
return;
}
fprintf(stderr, "--- starting interpreter ---\n");
struct NCDInterpreter_params params;
params.handler_finished = interpreter_handler_finished;
params.user = NULL;
params.retry_time = 5000;
params.extra_args = NULL;
params.num_extra_args = 0;
params.reactor = &reactor;
if (!NCDInterpreter_Init(&interpreter, program, params)) {
fprintf(stderr, "--- failed to initialize the interpreter ---\n");
return;
}
running = 1;
BReactor_EmscriptenSync(&reactor);
}
__attribute__((used))
void emncd_stop (void)
{
if (!running) {
fprintf(stderr, "--- cannot request termination, interpreter is not running! ---\n");
return;
}
fprintf(stderr, "--- requesting interpreter termination ---\n");
NCDInterpreter_RequestShutdown(&interpreter, 0);
BReactor_EmscriptenSync(&reactor);
}