--- a/svr-x11fwd.c	Wed Jun 03 22:59:59 2015 +0800
+++ b/svr-x11fwd.c	Thu Jun 04 22:25:28 2015 +0800
@@ -58,8 +58,8 @@
 	}
 
 	chansess->x11singleconn = buf_getbool(ses.payload);
-	chansess->x11authprot = buf_getstring(ses.payload, NULL);
-	chansess->x11authcookie = buf_getstring(ses.payload, NULL);
+	chansess->x11authprot = (char *)buf_getstring(ses.payload, NULL);
+	chansess->x11authcookie = (char *)buf_getstring(ses.payload, NULL);
 	chansess->x11screennum = buf_getint(ses.payload);
 
 	/* create listening socket */
@@ -107,7 +107,7 @@
 
 	int fd;
 	struct sockaddr_in addr;
-	int len;
+	socklen_t len;
 	int ret;
 	struct ChanSess * chansess = (struct ChanSess *)(listener->typedata);
 
@@ -203,7 +203,7 @@
 
 	if (send_msg_channel_open_init(fd, &chan_x11) == DROPBEAR_SUCCESS) {
 		ipstring = inet_ntoa(addr->sin_addr);
-		buf_putstring(ses.writepayload, ipstring, strlen(ipstring));
+		buf_putstring(ses.writepayload, (const unsigned char *)ipstring, strlen(ipstring));
 		buf_putint(ses.writepayload, addr->sin_port);
 
 		encrypt_packet();