Abstract data read from and written to the tun device,

allowing for a possible header on the front of all packets.
In OpenBSD, there's a structure containing the address
family here.
If we're building under OpenBSD, set up the ``flags'' part
of struct tuninfo (not there under FreeBSD) so that we config
the interface as POINTOPOINT.
Prefix prototypes with ``extern'' in os.c for consistency.

These changes are cosmetic under FreeBSD, but allow ppp to
build & work under OpenBSD (bar the srandomdev() stuff,
the inclusing of <net/if_var.h> and some Makefile symantecs).

1 files changed, 16 insertions, 0 deletions

diff --git a/usr.sbin/ppp/tun.h b/usr.sbin/ppp/tun.h
new file mode 100644
index 0000000..bc495e1
--- /dev/null
+++ b/usr.sbin/ppp/tun.h
@@ -0,0 +1,16 @@
+struct tun_data {
+#ifdef __OpenBSD__
+  struct tunnel_header head;
+#endif
+  u_char data[MAX_MRU];
+};
+
+#ifdef __OpenBSD__
+#define tun_fill_header(f,proto) do { (f).head.tun_af = (proto); } while (0)
+#define tun_check_header(f,proto) ((f).head.tun_af == (proto))
+#else
+#define tun_fill_header(f,proto) do { } while (0)
+#define tun_check_header(f,proto) (1)
+#endif
+
+extern void tun_configure(int, int);