1 files changed, 110 insertions, 0 deletions
diff --git a/print-lane.c b/print-lane.c
new file mode 100644
index 0000000..c5fa33b
--- /dev/null
+++ b/print-lane.c
@@ -0,0 +1,110 @@
+/*
+ * Marko Kiiskila carnil@cs.tut.fi
+ *
+ * Tampere University of Technology - Telecommunications Laboratory
+ *
+ * Permission to use, copy, modify and distribute this
+ * software and its documentation is hereby granted,
+ * provided that both the copyright notice and this
+ * permission notice appear in all copies of the software,
+ * derivative works or modified versions, and any portions
+ * thereof, that both notices appear in supporting
+ * documentation, and that the use of this software is
+ * acknowledged in any publications resulting from using
+ * the software.
+ *
+ * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
+ * SOFTWARE.
+ *
+ */
+
+/* \summary: ATM LANE printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+
+struct lecdatahdr_8023 {
+  nd_uint16_t le_header;
+  nd_mac_addr h_dest;
+  nd_mac_addr h_source;
+  nd_uint16_t h_type;
+};
+
+struct lane_controlhdr {
+  nd_uint16_t lec_header;
+  nd_uint8_t  lec_proto;
+  nd_uint8_t  lec_vers;
+  nd_uint16_t lec_opcode;
+};
+
+static const struct tok lecop2str[] = {
+	{ 0x0001,	"configure request" },
+	{ 0x0101,	"configure response" },
+	{ 0x0002,	"join request" },
+	{ 0x0102,	"join response" },
+	{ 0x0003,	"ready query" },
+	{ 0x0103,	"ready indication" },
+	{ 0x0004,	"register request" },
+	{ 0x0104,	"register response" },
+	{ 0x0005,	"unregister request" },
+	{ 0x0105,	"unregister response" },
+	{ 0x0006,	"ARP request" },
+	{ 0x0106,	"ARP response" },
+	{ 0x0007,	"flush request" },
+	{ 0x0107,	"flush response" },
+	{ 0x0008,	"NARP request" },
+	{ 0x0009,	"topology request" },
+	{ 0,		NULL }
+};
+
+static void
+lane_hdr_print(netdissect_options *ndo, const u_char *bp)
+{
+	ND_PRINT("lecid:%x ", GET_BE_U_2(bp));
+}
+
+/*
+ * This assumes 802.3, not 802.5, LAN emulation.
+ */
+void
+lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
+{
+	const struct lane_controlhdr *lec;
+
+	ndo->ndo_protocol = "lane";
+
+	lec = (const struct lane_controlhdr *)p;
+	if (GET_BE_U_2(lec->lec_header) == 0xff00) {
+		/*
+		 * LE Control.
+		 */
+		ND_PRINT("lec: proto %x vers %x %s",
+			 GET_U_1(lec->lec_proto),
+			 GET_U_1(lec->lec_vers),
+			 tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode)));
+		return;
+	}
+
+	/*
+	 * Go past the LE header.
+	 */
+	ND_TCHECK_2(p); /* Needed */
+	length -= 2;
+	caplen -= 2;
+	p += 2;
+
+	/*
+	 * Now print the encapsulated frame, under the assumption
+	 * that it's an Ethernet frame.
+	 */
+	ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2);
+}