Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 199 insertions, 0 deletions

diff --git a/epan/dissectors/packet-v5ef.c b/epan/dissectors/packet-v5ef.c
new file mode 100644
index 0000000..89afcd1
--- /dev/null
+++ b/epan/dissectors/packet-v5ef.c
@@ -0,0 +1,199 @@
+/* packet-v5ef.c
+ * Routines for V5 envelope function frame disassembly
+ * Rolf Fiedler <rolf.fiedler@innoventif.de>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+/*
+ * V5 bitstream over HDLC handling
+ *
+ * V5 references:
+ *
+ * ETS 300 324-1
+ * ETS 300 347-1
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <wiretap/wtap.h>
+
+void proto_register_v5ef(void);
+void proto_reg_handoff_v5ef(void);
+
+static int proto_v5ef = -1;
+static int hf_v5ef_direction = -1;
+static int hf_v5ef_address = -1;
+static int hf_v5ef_eah = -1;
+static int hf_v5ef_ea1 = -1;
+static int hf_v5ef_eal = -1;
+static int hf_v5ef_ea2 = -1;
+
+static gint ett_v5ef = -1;
+static gint ett_v5ef_address = -1;
+
+static dissector_handle_t v5dl_handle, lapd_phdr_handle, v5ef_handle;
+
+
+/*
+ * Bits in the address field.
+ */
+#define	V5EF_EAH		0xfc00	/* Service Access Point Identifier */
+#define	V5EF_EAH_SHIFT		10
+#define	V5EF_EA1		0x0100	/* First Address Extension bit */
+#define	V5EF_EAL		0x00fe	/* Terminal Endpoint Identifier */
+#define	V5EF_EAL_SHIFT		1
+#define	V5EF_EA2		0x0001	/* Second Address Extension bit */
+
+static const value_string v5ef_direction_vals[] = {
+	{ 0,		"AN->LE"},
+	{ 1,		"LE->AN"},
+	{ 0,		NULL }
+};
+
+#define MAX_V5EF_PACKET_LEN 1024
+
+static int
+dissect_v5ef(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+	struct isdn_phdr *isdn = (struct isdn_phdr *)data;
+	proto_tree	*v5ef_tree, *addr_tree;
+	proto_item	*v5ef_ti, *addr_ti;
+	int		 direction;
+	int		 v5ef_header_len;
+	guint16		 addr, eah, eal, efaddr;
+	tvbuff_t	*next_tvb;
+	const char	*srcname = "src";
+	const char	*dstname = "dst";
+
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "V5-EF");
+	col_clear(pinfo->cinfo, COL_INFO);
+
+	addr		= tvb_get_ntohs(tvb, 0);
+	eah		= (addr & V5EF_EAH) >> V5EF_EAH_SHIFT;
+	eal		= (addr & V5EF_EAL) >> V5EF_EAL_SHIFT;
+	efaddr		= (eah << 7) + eal;
+	v5ef_header_len = 2;	/* addr */
+
+	direction = isdn->uton;
+	if (direction==0) {
+	        srcname = "LE";
+	        dstname = "AN";
+	 } else if (direction > 0) {
+	        srcname = "AN";
+	        dstname = "LE";
+	}
+	col_set_str(pinfo->cinfo, COL_RES_DL_SRC, srcname);
+	col_set_str(pinfo->cinfo, COL_RES_DL_DST, dstname);
+
+	if (tree) {
+		proto_item *direction_ti;
+
+		v5ef_ti = proto_tree_add_item(tree, proto_v5ef, tvb, 0, -1,
+		    ENC_NA);
+		v5ef_tree = proto_item_add_subtree(v5ef_ti, ett_v5ef);
+
+		/*
+		 * Don't show the direction if we don't know it.
+		 */
+		if (direction != P2P_DIR_UNKNOWN) {
+			direction_ti = proto_tree_add_uint(v5ef_tree, hf_v5ef_direction,
+			                                   tvb, 0, 0, direction);
+			proto_item_set_generated(direction_ti);
+		}
+
+		addr_ti = proto_tree_add_uint(v5ef_tree, hf_v5ef_address, tvb,
+		    0, 2, addr);
+		addr_tree = proto_item_add_subtree(addr_ti, ett_v5ef_address);
+
+		proto_tree_add_uint(addr_tree, hf_v5ef_eah,  tvb, 0, 1, addr);
+		proto_tree_add_uint(addr_tree, hf_v5ef_ea1, tvb, 0, 1, addr);
+		proto_tree_add_uint(addr_tree, hf_v5ef_eal, tvb, 1, 1, addr);
+		proto_tree_add_uint(addr_tree, hf_v5ef_ea2, tvb, 1, 1, addr);
+	}
+	else {
+		v5ef_ti	  = NULL;
+		v5ef_tree = NULL;
+	}
+
+	if (tree)
+		proto_item_set_len(v5ef_ti, v5ef_header_len);
+
+	next_tvb = tvb_new_subset_remaining(tvb, v5ef_header_len);
+
+	if (efaddr>8175)
+		call_dissector(v5dl_handle,next_tvb, pinfo, tree);
+	else
+		call_dissector_with_data(lapd_phdr_handle, next_tvb, pinfo, tree, isdn);
+
+	return tvb_captured_length(tvb);
+}
+
+void
+proto_register_v5ef(void)
+{
+	static hf_register_info hf[] = {
+
+	{ &hf_v5ef_direction,
+	  { "Direction", "v5ef.direction", FT_UINT8, BASE_DEC, VALS(v5ef_direction_vals), 0x0,
+	  	NULL, HFILL }},
+
+	{ &hf_v5ef_address,
+	  { "Address Field", "v5ef.address", FT_UINT16, BASE_HEX, NULL, 0x0,
+	  	"Address", HFILL }},
+
+	{ &hf_v5ef_eah,
+	  { "EAH", "v5ef.eah", FT_UINT16, BASE_DEC, NULL, V5EF_EAH,
+	  	"Envelope Address High Part", HFILL }},
+
+	{ &hf_v5ef_ea1,
+	  { "EA1", "v5ef.ea1", FT_UINT16, BASE_DEC, NULL, V5EF_EA1,
+	  	"First Address Extension bit", HFILL }},
+
+	{ &hf_v5ef_eal,
+	  { "EAL", "v5ef.eal", FT_UINT16, BASE_DEC, NULL, V5EF_EAL,
+	  	"Envelope Address Low Part", HFILL }},
+
+	{ &hf_v5ef_ea2,
+	  { "EA2", "v5ef.ea2", FT_UINT16, BASE_DEC, NULL, V5EF_EA2,
+	  	"Second Address Extension bit", HFILL }},
+	};
+
+	static gint *ett[] = {
+		&ett_v5ef,
+		&ett_v5ef_address,
+	};
+
+	proto_v5ef = proto_register_protocol("V5 Envelope Function (v5ef)",
+					 "v5ef", "v5ef");
+	proto_register_field_array (proto_v5ef, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+
+	v5ef_handle = register_dissector("v5ef", dissect_v5ef, proto_v5ef);
+}
+
+void
+proto_reg_handoff_v5ef(void)
+{
+	dissector_add_uint("wtap_encap", WTAP_ENCAP_V5_EF, v5ef_handle);
+
+	lapd_phdr_handle = find_dissector_add_dependency("lapd-phdr", proto_v5ef);
+	v5dl_handle = find_dissector_add_dependency("v5dl", proto_v5ef);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */