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-rw-r--r--epan/dissectors/packet-fmtp.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/epan/dissectors/packet-fmtp.c b/epan/dissectors/packet-fmtp.c
new file mode 100644
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+++ b/epan/dissectors/packet-fmtp.c
@@ -0,0 +1,209 @@
+/* packet-fmtp.c
+ *
+ * Routines for FMTP version 2 packet dissection.
+ *
+ * The specifications of this public protocol can be found on Eurocontrol web site:
+ * http://www.eurocontrol.int/sites/default/files/publication/files/20070614-fmtp-spec-v2.0.pdf
+ *
+ * Copyright 2011, Christophe Paletou <c.paletou@free.fr>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include "packet-tcp.h"
+
+void proto_register_fmtp(void);
+void proto_reg_handoff_fmtp(void);
+
+static int proto_fmtp = -1;
+static int hf_fmtp_pdu_version = -1;
+static int hf_fmtp_pdu_reserved = -1;
+static int hf_fmtp_pdu_type = -1;
+static int hf_fmtp_pdu_length = -1;
+static gint ett_fmtp = -1;
+
+/* #define TCP_PORT_FMTP 8500 */
+#define FMTP_HEADER_LEN 5
+#define FMTP_MAX_DATA_LEN 10240
+#define FMTP_MAX_LEN FMTP_HEADER_LEN + FMTP_MAX_DATA_LEN
+
+#define FMTP_TYP_OPERATIONAL 1
+#define FMTP_TYP_OPERATOR 2
+#define FMTP_TYP_IDENTIFICATION 3
+#define FMTP_TYP_SYSTEM 4
+
+#define INFO_STR_SIZE 1024
+
+static const value_string packet_type_names[] = {
+ { FMTP_TYP_OPERATIONAL, "Operational message" },
+ { FMTP_TYP_OPERATOR, "Operator message" },
+ { FMTP_TYP_IDENTIFICATION, "Identification message" },
+ { FMTP_TYP_SYSTEM , "System message" },
+ { 0, NULL }
+};
+
+static const value_string system_message_names[] = {
+ { 12337, "Startup" }, /* 0x3031 */
+ { 12336, "Shutdown" }, /* 0x3030 */
+ { 12339, "Heartbeat" }, /* 0x3033 */
+ { 0, NULL }
+};
+
+static int
+dissect_fmtp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+ guint8 packet_type;
+ guint16 packet_len;
+ tvbuff_t *next_tvb;
+ proto_item *ti = NULL;
+ proto_tree *fmtp_tree = NULL;
+
+ packet_type = tvb_get_guint8(tvb, 4);
+ packet_len = tvb_get_ntohs(tvb, 2);
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "FMTP");
+
+ /* Clear out stuff in the info column */
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ ti = proto_tree_add_item(tree, proto_fmtp, tvb, 0, -1, ENC_NA);
+ proto_item_append_text(ti, ", %s",
+ val_to_str(packet_type, packet_type_names, "Unknown (0x%02x)"));
+
+ switch (packet_type) {
+
+ case FMTP_TYP_IDENTIFICATION:
+ proto_item_append_text(ti, " (%s)",
+ tvb_get_string_enc(pinfo->pool, tvb, FMTP_HEADER_LEN, packet_len-FMTP_HEADER_LEN, ENC_ASCII));
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%s (%s)",
+ val_to_str(packet_type, packet_type_names, "Unknown (0x%02x)"),
+ tvb_get_string_enc(pinfo->pool, tvb, FMTP_HEADER_LEN, packet_len-FMTP_HEADER_LEN, ENC_ASCII));
+ break;
+
+ case FMTP_TYP_SYSTEM:
+ proto_item_append_text(ti, " (%s)",
+ tvb_get_string_enc(pinfo->pool, tvb, FMTP_HEADER_LEN, packet_len-FMTP_HEADER_LEN, ENC_ASCII));
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%s (%s)",
+ val_to_str(packet_type, packet_type_names, "Unknown (0x%02x)"),
+ val_to_str(tvb_get_ntohs(tvb, FMTP_HEADER_LEN), system_message_names, "Unknown (0x%02x)"));
+ break;
+
+ default:
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
+ val_to_str(packet_type, packet_type_names, "Unknown (0x%02x)"));
+ break;
+ }
+ if (tree) { /* we are being asked for details */
+ fmtp_tree = proto_item_add_subtree(ti, ett_fmtp);
+ proto_tree_add_item(fmtp_tree, hf_fmtp_pdu_version, tvb, 0, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(fmtp_tree, hf_fmtp_pdu_reserved, tvb, 1, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(fmtp_tree, hf_fmtp_pdu_length, tvb, 2, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item(fmtp_tree, hf_fmtp_pdu_type, tvb, 4, 1, ENC_BIG_ENDIAN);
+
+ next_tvb = tvb_new_subset_remaining(tvb, FMTP_HEADER_LEN);
+ call_data_dissector(next_tvb, pinfo, fmtp_tree);
+ }
+
+ return tvb_captured_length(tvb);
+}
+
+static guint
+get_fmtp_message_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
+{
+ return (guint)tvb_get_ntohs(tvb, offset+2);
+}
+
+static gboolean
+dissect_fmtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+ guint16 length;
+
+ if (tvb_captured_length(tvb) < 5)
+ return FALSE;
+ /*
+ * Check that packet looks like FMTP before going further
+ */
+ /* VERSION must currently be 0x02 */
+ if (tvb_get_guint8(tvb, 0) != 0x02) return (FALSE);
+ /* RESERVED must currently be 0x00 */
+ if (tvb_get_guint8(tvb, 1) != 0x00) return (FALSE);
+ length = tvb_get_ntohs(tvb, 2);
+ /* LENGTH must currently not exceed 5 (header) + 10240 (data) */
+ if ((length > FMTP_MAX_LEN) || (length < FMTP_HEADER_LEN)) return (FALSE);
+ /* TYP must currently be in range 0x01-0x04 */
+ if ((tvb_get_guint8(tvb, 4) < 0x01) || (tvb_get_guint8(tvb, 4) > 0x04))
+ return (FALSE);
+
+ tcp_dissect_pdus(tvb, pinfo, tree, TRUE, FMTP_HEADER_LEN,
+ get_fmtp_message_len, dissect_fmtp_message, data);
+ return (TRUE);
+}
+
+void
+proto_register_fmtp(void)
+{
+ static hf_register_info hf[] = {
+ { &hf_fmtp_pdu_version,
+ { "Version", "fmtp.version",
+ FT_UINT8, BASE_DEC,
+ NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_fmtp_pdu_reserved,
+ { "Reserved", "fmtp.reserved",
+ FT_UINT8, BASE_DEC,
+ NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_fmtp_pdu_length,
+ { "Length", "fmtp.length",
+ FT_UINT16, BASE_DEC,
+ NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_fmtp_pdu_type,
+ { "Type", "fmtp.type",
+ FT_UINT8, BASE_DEC,
+ VALS(packet_type_names), 0x0,
+ NULL, HFILL }
+ }
+ };
+
+ /* Setup protocol subtree array */
+ static gint *ett[] = {
+ &ett_fmtp
+ };
+
+ proto_fmtp = proto_register_protocol("Flight Message Transfer Protocol (FMTP)", "FMTP", "fmtp");
+
+ proto_register_field_array(proto_fmtp, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+}
+
+void
+proto_reg_handoff_fmtp(void)
+{
+ /* Register as heuristic dissector for TCP */
+ heur_dissector_add("tcp", dissect_fmtp, "FMTP over TCP", "fmtp_tcp", proto_fmtp, HEURISTIC_ENABLE);
+}
+
+/*
+ * Editor modelines - https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
+
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