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-rw-r--r--print-lane.c110
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diff --git a/print-lane.c b/print-lane.c
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+/*
+ * 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);
+}