added in some mtu defns

[ppp.git] / include / net / ppp_defs.h

diff --git a/include/net/ppp_defs.h b/include/net/ppp_defs.h
index 9b6ca4adfd9f79dd4b4491cfbec84210eac8bb17..d1383f3351b81b8e2d5061401d646a2d85ba763a 100644 (file)
--- a/include/net/ppp_defs.h
+++ b/include/net/ppp_defs.h
@@ -1,4 +1,4 @@
-/*     $Id: ppp_defs.h,v 1.10 1997/03/04 03:32:37 paulus Exp $ */
+/*     $Id: ppp_defs.h,v 1.11 1997/04/30 05:46:24 paulus Exp $ */
 
 /*
  * ppp_defs.h - PPP definitions.
@@ -35,7 +35,21 @@
  */
 #define PPP_HDRLEN     4       /* octets for standard ppp header */
 #define PPP_FCSLEN     2       /* octets for FCS */
+
+/*
+ * Packet sizes
+ *
+ * Note - lcp shouldn't be allowed to negotiate stuff outside these
+ *       limits.  See lcp.h in the pppd directory.
+ * (XXX - these constants should simply be shared by lcp.c instead
+ *       of living in lcp.h)
+ */
+#define        PPP_MTU         1500    /* Default MTU (size of Info field) */
+#define PPP_MAXMTU     65535 - (PPP_HDRLEN + PPP_FCSLEN)
+#define PPP_MINMTU     64
 #define PPP_MRU                1500    /* default MRU = max length of info field */
+#define PPP_MAXMRU     65000   /* Largest MRU we allow */
+#define PPP_MINMRU     128
 
 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
 #define PPP_CONTROL(p) (((u_char *)(p))[1])