uSock 0.6 for Mac OS X

diff -ru usock-0.6.orig/linux/device_tap.c usock-0.6/linux/device_tap.c
--- usock-0.6.orig/linux/device_tap.c	2010-05-07 11:49:06.000000000 +0900
+++ usock-0.6/linux/device_tap.c	2010-05-07 11:59:39.000000000 +0900
@@ -16,13 +16,18 @@
 #include <sys/ioctl.h>
 #include <sys/select.h>
 #include <sys/socket.h>
+#ifdef linux
 #include <linux/if.h>
 #include <linux/if_tun.h>
+#endif
 #include "device.h"
 
 
+#ifdef linux
 #define TUNDEV "/dev/net/tun"
-
+#else
+#define TUNDEV "/dev/tap0"
+#endif
 
 static int fd = -1;
 
@@ -31,7 +36,6 @@
   Initialize device
 */
 void dev_init(void) {
-  struct ifreq ifr;
   char buf[256];
 
   if ((fd = open(TUNDEV, O_RDWR)) < 0) {
@@ -39,6 +43,8 @@
     exit(1);
   }
 
+#if linux
+  struct ifreq ifr;
   memset(&ifr, 0, sizeof(ifr));
   ifr.ifr_flags = (IFF_TAP | IFF_NO_PI);
 
@@ -46,8 +52,9 @@
     perror("ERROR: dev_init() failed");
     exit(1);
   }
+#endif
 
-  sprintf(buf, "ifconfig tap0 inet 192.168.1.1");
+  sprintf(buf, "ifconfig tap0 inet 192.168.0.1");
   system(buf);
 
   return;