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/* main.c
* (c) Jonas Gunz, 2019
* License: MIT
* */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "log.h"
#include "server.h"
#ifdef _TEST
#include "test.h"
#endif
void print_help( char *_argv0 ) {
printf(
"dns\n"
"Usage: %s [OPTIONS]\n\n"
"Options:\n"
" -h Display this help text\n"
" -i IP IP to bind to, default: 0.0.0.0\n"
" -p PORT Port to listen, default: 53 on\n"
" -z FILE Zonefile\n", _argv0
);
}
void parse_args( server_config_t *_config, int argc, char* argv[]) {
int i, o;
memset( _config, 0, sizeof( server_config_t ) );
_config->bind_ip = "0.0.0.0";
_config->bind_port = 53;
_config->zonefile = "/nofile";
for( i = 1; i < argc; i++ ) {
const int icpy = i;
if ( argv[i][0] != '-' ) {
print_help( argv[0] );
exit( 1 );
}
for( o = 1; o < strlen(argv[icpy]); o++ ) {
switch( argv[icpy][o] ) {
case 'h':
print_help( argv[0] );
exit( 0 );
case 'i':
_config->bind_ip = argv[++i];
break;
case 'p':
_config->bind_port = atoi( argv[++i] );
break;
case 'z':
_config->zonefile = argv[++i];
break;
default:
printf( "Unkown option \"%c\"\n", argv[icpy][o] );
print_help( argv[0] );
exit( 1 );
}
}
}
}
int main(int argc, char* argv[])
{
server_config_t config;
parse_args( &config, argc, argv );
log_init_stdout(_LOG_DEBUG);
if ( getuid() == 0 )
LOGPRINTF(_LOG_WARNING, "Running as root is not a good idea. Use setcap or unprivileged port instead.");
#ifdef _TEST
run_test();
#else
server_start( &config );
#endif
return 0;
}
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