asdf

1 files changed, 74 insertions, 15 deletions

diff --git a/src/main.c b/src/main.c
index bf4260f..1dcd0f4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -10,20 +10,34 @@
 
 #include <unistd.h>
 
+#include <signal.h>
+
 #define PRINT_ERRNO() {printf("%s:%i %i:%s\n", __FILE__, __LINE__, errno, strerror(errno));}
 
 #define UDP_BUFFER_LEN 512
 
-int dns_parse_packet(int _socket, struct sockaddr_in *sockaddr_client, socklen_t sockaddr_client_len, char* buffer);
+int sock_server;
+
+int dns_parse_packet ( 	int _socket,
+			struct sockaddr_in *sockaddr_client,
+			socklen_t sockaddr_client_len,
+			char* buffer,
+			int bufflen );
+
+void signal_term ( );
 
-int main(int argc, char* argv[])
-{
+void signal_term_child ( );
+
+int main(	int argc,
+		char* argv[] ) {
 	int 		ret;
-	int 		sock_server;
        	struct		sockaddr_in sock_server_addr;
 	
 	char recv_buffer[ UDP_BUFFER_LEN ];
 
+	signal ( SIGTERM, signal_term );
+	signal ( SIGINT,  signal_term );
+
 	sock_server = socket ( AF_INET, SOCK_DGRAM, 0 );
 	if ( sock_server == -1 ) {
 		PRINT_ERRNO();
@@ -34,18 +48,20 @@ int main(int argc, char* argv[])
 	sock_server_addr.sin_family = AF_INET;
 	sock_server_addr.sin_port   = htons( 53 );
 	ret = inet_aton ( "0.0.0.0", & sock_server_addr.sin_addr );
-	if( ret == 0 ) {//Error on 0, no errno
-		printf("Invalid IP\n");
+	if( ret == 0 ) { //Error on 0, no errno!
+		printf( "inet_aton(): Invalid IP\n" );
 		return 1;
 	}
 
-	ret = bind( sock_server , &sock_server_addr, sizeof(struct sockaddr_in) );
+	ret = bind(	sock_server,
+			(struct sockaddr*) &sock_server_addr,
+			sizeof(struct sockaddr_in) );
 	if ( ret == -1 ) {
 		PRINT_ERRNO();
 		return errno;
 	}
 
-	//while( 1 )
+	while( 1 )
 	{
 		struct 		sockaddr_in sock_client_addr;
 		socklen_t	sock_client_addr_len;
@@ -53,11 +69,29 @@ int main(int argc, char* argv[])
 		sock_client_addr_len = sizeof ( struct sockaddr_in );
 		memset ( &sock_client_addr, '\0', sock_client_addr_len );
 
-		ret = recvfrom ( sock_server, recv_buffer, UDP_BUFFER_LEN, 0, &sock_client_addr, &sock_client_addr_len );
+		ret = recvfrom (sock_server,
+				recv_buffer,
+				UDP_BUFFER_LEN,
+				0,
+				(struct sockaddr*) &sock_client_addr,
+				&sock_client_addr_len );
 		if ( ret == -1 ) {
 			PRINT_ERRNO();
 			return errno;
 		}
+
+		printf ( "recieved\n" );
+
+		if ( dns_parse_packet ( sock_server,
+					&sock_client_addr,
+					sock_client_addr_len,
+					recv_buffer,
+					ret ) ) {
+			PRINT_ERRNO();
+			return errno;
+		}
+
+		printf ( "forked\n" );
 	}
 
 	close( sock_server );
@@ -65,15 +99,40 @@ int main(int argc, char* argv[])
 	return 0;
 }
 
-
-int dns_parse_packet(int _socket, struct sockaddr_in *sockaddr_client, socklen_t sockaddr_client_len, char* buffer) 
-{
-	pid_t = pid fork();
+int dns_parse_packet (	int _socket,
+			struct sockaddr_in *sockaddr_client,
+			socklen_t sockaddr_client_len,
+			char* buffer,
+			int bufflen ) {
+	pid_t pid = fork();
 	
-	if ( pid == 0)
+	if ( pid > 0)
 		return 0;
 	else if ( pid < 0 )
 		return errno;
 
-	exit (0);
+	signal ( SIGTERM, signal_term_child);
+
+	sleep ( 999 ); //Keep child active
+
+	exit ( 0 );
+}
+
+void signal_term ( ) {
+	printf( "Recieved Signal. Terminating active connections and closing socket\n" );
+	
+	kill ( 0, SIGTERM ); //terminate all child processes
+
+	shutdown ( sock_server, SHUT_RDWR );
+	close ( sock_server );
+
+	printf( "done\n" );
+
+	exit( 0 );
+}
+
+void signal_term_child ( ) {
+	close ( sock_server );
+	printf ( "%i: Active connection terminated\n", getpid() );
+	exit( 0 );
 }