X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=include%2Fulogd%2Fgre.h;fp=include%2Fulogd%2Fgre.h;h=50cc7d5472c3c89e977915e91fc147c377525e5d;hb=0be9704d6b24d09ebd55beedec52758cb88c570b;hp=0000000000000000000000000000000000000000;hpb=6747e89080a8265aa73320bd9f40a0fa6e1c161e;p=distributedratelimiting.git

diff --git a/include/ulogd/gre.h b/include/ulogd/gre.h
new file mode 100644
index 0000000..50cc7d5
--- /dev/null
+++ b/include/ulogd/gre.h
@@ -0,0 +1,34 @@
+#ifndef _ULOGD_GRE_H_
+#define _ULOGD_GRE_H_
+
+#define GRE_FLAG_CKSUM  htons(0x8000)  /* Checksum Present */
+#define GRE_FLAG_ROUTE  htons(0x4000)  /* Routing Present */
+#define GRE_FLAG_KEY    htons(0x2000)  /* Key Present */
+#define GRE_FLAG_SEQ    htons(0x1000)  /* Sequence Present */
+#define GRE_FLAG_SSR    htons(0x0800)  /* Strict Source Route */
+#define GRE_FLAG_RECUR  htons(0x0700)  /* Recursion Control */
+#define GRE_FLAG_ACK    htons(0x0080)  /* Acknowledgement Present (PPTP only) */
+#define GRE_FLAG_FLAGS  htons(0x0078)  /* Additional Flags */
+#define GRE_FLAG_VER    htons(0x0007)  /* Version Number */
+#define GRE_VER_GRE     htons(0x0000)  /* GRE version 0 (RFC1701 GRE) */
+#define GRE_VER_PPTP    htons(0x0001)  /* Enhanced GRE (RFC2637 PPTP) */
+
+struct grehdr {
+  u_int16_t  flags_ver;          /* See above */
+  u_int16_t  protocol;           /* Ethernet protocol type */
+  u_int16_t  cksum;              /* present if (flags_ver & GRE_FLAG_CKSUM) */
+  u_int16_t  reserved1;          /* present if (flags_ver & GRE_FLAG_CKSUM) */
+  u_int32_t  key;                /* present if (flags_ver & GRE_FLAG_KEY) */
+  u_int32_t  seq;                /* present if (flags_ver & GRE_FLAG_SEQ) */
+};
+
+struct pptphdr {
+  u_int16_t  flags_ver;          /* See above */
+  u_int16_t  protocol;           /* Ethernet protocol type */
+  u_int16_t  payload_len;        /* following payload length (not including this header) */
+  u_int16_t  call_id;            /* peer call ID */
+  u_int32_t  seq;                /* present if (flags_ver & GRE_FLAG_SEQ) */
+  u_int32_t  ack;                /* present if (flags_ver & GRE_FLAG_ACK) */
+};
+
+#endif  /* _ULOGD_GRE_H_ */