Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 258 insertions, 0 deletions

diff --git a/epan/dissectors/packet-redback.c b/epan/dissectors/packet-redback.c
new file mode 100644
index 00000000..e387f1b0
--- /dev/null
+++ b/epan/dissectors/packet-redback.c
@@ -0,0 +1,258 @@
+/* packet-redback.c
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ *
+ * Ericsson SmartEdge tcpdump trace disassembly
+ * Copyright 2005-2014 Florian Lohoff <f@zz.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/expert.h>
+#include <wiretap/wtap.h>
+
+
+void proto_register_redback(void);
+void proto_reg_handoff_redback(void);
+
+static dissector_handle_t redback_handle;
+
+static gint ett_redback = -1;
+
+static dissector_table_t osinl_incl_subdissector_table;
+static dissector_table_t osinl_excl_subdissector_table;
+
+static dissector_handle_t ipv4_handle;
+static dissector_handle_t ipv6_handle;
+static dissector_handle_t ethnofcs_handle;
+static dissector_handle_t clnp_handle;
+static dissector_handle_t arp_handle;
+static dissector_handle_t ppp_handle;
+static dissector_handle_t ppphdlc_handle;
+
+static int proto_redback = -1;
+
+static int hf_redback_circuit = -1;
+static int hf_redback_context = -1;
+static int hf_redback_dataoffset = -1;
+static int hf_redback_flags = -1;
+static int hf_redback_l3offset = -1;
+static int hf_redback_length = -1;
+static int hf_redback_padding = -1;
+static int hf_redback_protocol = -1;
+static int hf_redback_unknown = -1;
+
+static expert_field ei_redback_protocol = EI_INIT;
+
+static int
+dissect_redback(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+	guint16		l3off, dataoff, proto;
+	proto_item	*ti, *protocol_item;
+	proto_tree	*rbtree = NULL;
+	tvbuff_t	*next_tvb;
+
+	col_set_str(pinfo->cinfo,COL_PROTOCOL,"RBN");
+
+	dataoff = tvb_get_ntohs(tvb, 20);
+	l3off = tvb_get_ntohs(tvb, 22);
+
+	ti = proto_tree_add_item(tree, proto_redback, tvb, 0, -1, ENC_NA);
+	rbtree = proto_item_add_subtree(ti, ett_redback);
+
+	proto_tree_add_item(rbtree, hf_redback_context, tvb, 0, 4, ENC_BIG_ENDIAN);
+	proto_tree_add_item(rbtree, hf_redback_flags, tvb, 4, 4, ENC_BIG_ENDIAN);
+	proto_tree_add_item(rbtree, hf_redback_circuit, tvb, 8, 8, ENC_BIG_ENDIAN);
+	proto_tree_add_item(rbtree, hf_redback_length, tvb, 16, 2, ENC_BIG_ENDIAN);
+	protocol_item = proto_tree_add_item(rbtree, hf_redback_protocol, tvb, 18, 2, ENC_BIG_ENDIAN);
+	proto_tree_add_item(rbtree, hf_redback_dataoffset, tvb, 20, 2, ENC_BIG_ENDIAN);
+	proto_tree_add_item(rbtree, hf_redback_l3offset, tvb, 22, 2, ENC_BIG_ENDIAN);
+
+	if (dataoff > 24) {
+		proto_tree_add_item(rbtree, hf_redback_padding, tvb, 24, dataoff-24, ENC_NA);
+	}
+
+	proto = tvb_get_ntohs(tvb, 18);
+	switch(proto) {
+		case 0x01:
+			/*
+			 * IP on Ethernet - Incoming data points to an ethernet header
+			 * outgoing we have a pure IPv4 Packet
+			 */
+			next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+			if (dataoff == l3off)
+				call_dissector(ipv4_handle, next_tvb, pinfo, tree);
+			else if (dataoff+2 == l3off)
+				call_dissector(ppp_handle, next_tvb, pinfo, tree);
+			else if (dataoff+4 == l3off)
+				call_dissector(ppphdlc_handle, next_tvb, pinfo, tree);
+			else
+				call_dissector(ethnofcs_handle, next_tvb, pinfo, tree);
+			break;
+		case 0x02:
+			/*
+			 * This is ISIS - Either incoming with ethernet FCS
+			 * and CLNP - passed to the eth dissector or in case
+			 * of outgoing it's pure ISIS and the linecard attaches
+			 * the ethernet and CLNP headers ...
+			 *
+			 */
+			next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+			if (l3off > dataoff) {
+				call_dissector(ethnofcs_handle, next_tvb, pinfo, tree);
+			} else {
+				guint8 nlpid = tvb_get_guint8(tvb, dataoff);
+				if(dissector_try_uint(osinl_incl_subdissector_table, nlpid, next_tvb, pinfo, tree))
+					break;
+				next_tvb = tvb_new_subset_remaining(tvb, dataoff+1);
+				if(dissector_try_uint(osinl_excl_subdissector_table, nlpid, next_tvb, pinfo, tree))
+					break;
+				next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+				call_data_dissector(next_tvb, pinfo, tree);
+			}
+			break;
+		case 0x06: {
+			/*
+			 * PPP Messages e.g. LCP, IPCP etc - possibly on ethernet in case of PPPoE.
+			 * PPPoE messages are Protocol 8 ...
+			 */
+			guint32		flags;
+			flags = tvb_get_ntohl(tvb, 4);
+
+			if (flags & 0x04000000) {
+				next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+			} else {
+				if (tree)
+					proto_tree_add_item(rbtree, hf_redback_unknown, tvb, dataoff, 4, ENC_NA);
+				next_tvb = tvb_new_subset_remaining(tvb, dataoff+4);
+			}
+
+			if (l3off == dataoff) {
+				call_dissector(ppp_handle, next_tvb, pinfo, tree);
+			} else {
+				call_dissector(ethnofcs_handle, next_tvb, pinfo, tree);
+			}
+			break;
+		}
+		case 0x03: /* Unicast Ethernet tx - Seen with PPPoE PADO */
+		case 0x04: /* Unicast Ethernet rx - Seen with ARP  */
+		case 0x08: /* Broadcast Ethernet rx - Seen with PPPoE PADI */
+			next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+			call_dissector(ethnofcs_handle, next_tvb, pinfo, tree);
+			break;
+		case 0x09: /* IPv6 either encapsulated as ethernet or native ip */
+			next_tvb = tvb_new_subset_remaining(tvb, dataoff);
+			if (dataoff == l3off)
+				call_dissector(ipv6_handle, next_tvb, pinfo, tree);
+			else
+				call_dissector(ethnofcs_handle, next_tvb, pinfo, tree);
+			break;
+		default:
+			expert_add_info(pinfo, protocol_item, &ei_redback_protocol);
+			break;
+	}
+	return tvb_captured_length(tvb);
+}
+
+void
+proto_register_redback(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_redback_context,
+			{ "Context", "redback.context",
+			  FT_UINT32, BASE_HEX, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_flags,
+			{ "Flags", "redback.flags",
+			  FT_UINT32, BASE_HEX, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_circuit,
+			{ "Circuit", "redback.circuit",
+			  FT_UINT64, BASE_HEX, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_length,
+			{ "Length", "redback.length",
+			  FT_UINT16, BASE_DEC, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_protocol,
+			{ "Protocol", "redback.protocol",
+			  FT_UINT16, BASE_DEC, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_l3offset,
+			{ "Layer 3 Offset", "redback.l3offset",
+			  FT_UINT16, BASE_DEC, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_dataoffset,
+			{ "Data Offset", "redback.dataoffset",
+			  FT_UINT16, BASE_DEC, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_padding,
+			{ "Padding", "redback.padding",
+			  FT_BYTES, BASE_NONE, NULL, 0x0,
+			  NULL, HFILL }
+		},
+		{ &hf_redback_unknown,
+			{ "Unknown", "redback.unknown",
+			  FT_BYTES, BASE_NONE, NULL, 0x0,
+			  NULL, HFILL }
+		},
+	};
+
+	static gint *ett[] = {
+		&ett_redback
+	};
+
+	static ei_register_info ei[] = {
+		{ &ei_redback_protocol, { "redback.protocol.unknown", PI_PROTOCOL, PI_WARN, "Unknown Protocol Data", EXPFILL }},
+	};
+
+	expert_module_t* expert_redback;
+
+	proto_redback = proto_register_protocol("Redback", "Redback", "redback");
+	proto_register_field_array(proto_redback, hf, array_length(hf));
+	redback_handle = register_dissector("redback", dissect_redback, proto_redback);
+
+	proto_register_subtree_array(ett, array_length(ett));
+	expert_redback = expert_register_protocol(proto_redback);
+	expert_register_field_array(expert_redback, ei, array_length(ei));
+}
+
+void
+proto_reg_handoff_redback(void)
+{
+	osinl_incl_subdissector_table = find_dissector_table("osinl.incl");
+	osinl_excl_subdissector_table = find_dissector_table("osinl.excl");
+
+	ipv4_handle = find_dissector_add_dependency("ip", proto_redback);
+	ipv6_handle = find_dissector_add_dependency("ipv6", proto_redback);
+	ethnofcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_redback);
+	clnp_handle = find_dissector_add_dependency("clnp", proto_redback);
+	arp_handle = find_dissector_add_dependency("arp", proto_redback);
+	ppp_handle = find_dissector_add_dependency("ppp", proto_redback);
+	ppphdlc_handle = find_dissector_add_dependency("ppp_hdlc", proto_redback);
+
+	dissector_add_uint("wtap_encap", WTAP_ENCAP_REDBACK, redback_handle);
+}
+
+/*
+ * 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:
+ */