portability fixes

babeld.c

@@ -111,7 +111,7 @@ main(int argc, char **argv)
 
     gettime(&now);
 
-    rfd = open("/dev/urandom", O_RDONLY);
+    rfd = open(RND_DEV, O_RDONLY);
     if(rfd < 0) {
         perror("open(random)");
     } else {

babeld.h

@@ -80,6 +80,14 @@ THE SOFTWARE.
 #endif
 #endif
 
+#if defined(__linux)
+#define RND_DEV "/dev/urandom"
+#elif defined(__OpenBSD__)
+#define RND_DEV "/dev/arandom"
+#else
+#error "don't know which random device to use"
+#endif
+
 extern struct timeval now;
 extern int debug;
 extern time_t reboot_time;

config.c

@@ -24,7 +24,7 @@ THE SOFTWARE.
 #include <string.h>
 #include <stdio.h>
 
-#ifndef __APPLE__
+#ifdef __linux
 /* Defining it rather than including <linux/rtnetlink.h> because this
  * implies <asm/types.h> on Linux 2.4 */
 #define RTPROT_BOOT 3 /* Route installed during boot */
@@ -646,7 +646,7 @@ filter_match(struct filter *f, const unsigned char *id,
             return 0;
     } else if(proto == RTPROT_BABEL_LOCAL) {
         return 0;
-#ifndef __APPLE__
+#ifdef __linux
     } else if(proto == RTPROT_BOOT) {
         return 0;
 #endif

kernel.c

@@ -26,10 +26,10 @@ THE SOFTWARE.
 
 #include "babeld.h"
 
-#ifdef __APPLE__
-#include "kernel_socket.c"
-#else
+#ifdef __linux
 #include "kernel_netlink.c"
+#else
+#include "kernel_socket.c"
 #endif
 
 /* Like gettimeofday, but returns monotonic time.  If POSIX clocks are not