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-rw-r--r--include/net/pptp.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/net/pptp.h b/include/net/pptp.h
new file mode 100644
index 0000000000..e63176bdd4
--- /dev/null
+++ b/include/net/pptp.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_PPTP_H
+#define _NET_PPTP_H
+
+#include <linux/types.h>
+#include <net/gre.h>
+
+#define PPP_LCP_ECHOREQ 0x09
+#define PPP_LCP_ECHOREP 0x0A
+#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
+
+#define MISSING_WINDOW 20
+#define WRAPPED(curseq, lastseq)\
+ ((((curseq) & 0xffffff00) == 0) &&\
+ (((lastseq) & 0xffffff00) == 0xffffff00))
+
+#define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header))
+struct pptp_gre_header {
+ struct gre_base_hdr gre_hd;
+ __be16 payload_len;
+ __be16 call_id;
+ __be32 seq;
+ __be32 ack;
+} __packed;
+
+
+#endif