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diff --git a/epan/dissectors/packet-banana.c b/epan/dissectors/packet-banana.c
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+/* packet-bananna.c
+ * Routines for the Twisted Banana serialization protocol dissection
+ * Copyright 2009, Gerald Combs <gerald@wireshark.org>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+/*
+ * Based on "Banana Protocol Specifications"
+ * https://twisted.org/documents/16.1.1/core/specifications/banana.html
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/expert.h>
+
+void proto_register_banana(void);
+void proto_reg_handoff_banana(void);
+
+/* Initialize the protocol and registered fields */
+static int proto_banana = -1;
+static int hf_banana_list = -1;
+static int hf_banana_int = -1;
+static int hf_banana_string = -1;
+static int hf_banana_neg_int = -1;
+static int hf_banana_float = -1;
+static int hf_banana_lg_int = -1;
+static int hf_banana_lg_neg_int = -1;
+static int hf_banana_pb = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_banana = -1;
+static gint ett_list = -1;
+
+static expert_field ei_banana_unknown_type = EI_INIT;
+static expert_field ei_banana_too_many_value_bytes = EI_INIT;
+static expert_field ei_banana_length_too_long = EI_INIT;
+static expert_field ei_banana_value_too_large = EI_INIT;
+static expert_field ei_banana_pb_error = EI_INIT;
+
+static dissector_handle_t banana_handle;
+
+#define BE_LIST 0x80
+#define BE_INT 0x81
+#define BE_STRING 0x82
+#define BE_NEG_INT 0x83
+#define BE_FLOAT 0x84
+#define BE_LG_INT 0x85
+#define BE_LG_NEG_INT 0x86
+#define BE_PB 0x87
+
+#define is_element(b) (b >= BE_LIST && b <= BE_PB)
+
+static const value_string type_vals[] = {
+ { BE_LIST, "List" },
+ { BE_INT, "Integer" },
+ { BE_STRING, "String" },
+ { BE_NEG_INT, "Negative Integer" },
+ { BE_FLOAT, "Float" },
+ { BE_LG_INT, "Large Integer" },
+ { BE_LG_NEG_INT, "Large Negative Integer" },
+ { BE_PB, "pb Profile"},
+ { 0, NULL }
+};
+
+static const value_string pb_vals[] = {
+ { 0x01, "None" },
+ { 0x02, "class" },
+ { 0x03, "dereference" },
+ { 0x04, "reference" },
+ { 0x05, "dictionary" },
+ { 0x06, "function" },
+ { 0x07, "instance" },
+ { 0x08, "list" },
+ { 0x09, "module" },
+ { 0x0a, "persistent" },
+ { 0x0b, "tuple" },
+ { 0x0c, "unpersistable" },
+ { 0x0d, "copy" },
+ { 0x0e, "cache" },
+ { 0x0f, "cached" },
+ { 0x10, "remote" },
+ { 0x11, "local" },
+ { 0x12, "lcache" },
+ { 0x13, "version" },
+ { 0x14, "login" },
+ { 0x15, "password" },
+ { 0x16, "challenge" },
+ { 0x17, "logged_in" },
+ { 0x18, "not_logged_in" },
+ { 0x19, "cachemessage" },
+ { 0x1a, "message" },
+ { 0x1b, "answer" },
+ { 0x1c, "error" },
+ { 0x1d, "decref" },
+ { 0x1e, "decache" },
+ { 0x1f, "uncache" },
+ { 0, NULL }
+};
+
+#define MAX_ELEMENT_VAL 2147483647 /* Max TE value */
+#define MAX_ELEMENT_INT_LEN 4
+#define MAX_ELEMENT_VAL_LEN 8
+
+/* Dissect the packets */
+
+static int
+dissect_banana_element(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset) {
+ proto_item *ti;
+ proto_tree *list_tree;
+ guint8 byte = 0;
+ gint64 val = 0;
+ gint val_len = 0;
+ int start_offset = offset;
+ int old_offset;
+ int i;
+
+ /* Accumulate our value/length 'til we hit a valid type */
+ while (tvb_reported_length_remaining(tvb, offset) > 0) {
+ byte = tvb_get_guint8(tvb, offset);
+ offset++;
+
+ if (byte & 0x80) {
+ if (is_element(byte)) {
+ break;
+ } else {
+ expert_add_info_format(pinfo, NULL, &ei_banana_unknown_type, "Unknown type %u", byte);
+ }
+ } else {
+ val_len++;
+ if (val_len > MAX_ELEMENT_VAL_LEN) {
+ expert_add_info(pinfo, NULL, &ei_banana_too_many_value_bytes);
+ }
+ val += byte + (val << 7);
+ }
+ }
+
+ /* Type */
+ switch (byte) {
+ case BE_LIST:
+ if (val > MAX_ELEMENT_VAL) {
+ expert_add_info_format(pinfo, NULL, &ei_banana_length_too_long, "List length %" PRId64 " longer than we can handle", val);
+ }
+ ti = proto_tree_add_uint_format_value(tree, hf_banana_list, tvb, start_offset, offset - start_offset - 1, (guint32) val, "(%d items)", (gint) val);
+ list_tree = proto_item_add_subtree(ti, ett_list);
+ for (i = 0; i < val; i++) {
+ old_offset = offset;
+ offset += dissect_banana_element(tvb, pinfo, list_tree, offset);
+ if (offset <= old_offset) {
+ return offset - start_offset;
+ }
+ }
+ break;
+ case BE_INT:
+ if (val > MAX_ELEMENT_VAL) {
+ expert_add_info_format(pinfo, NULL, &ei_banana_value_too_large, "Integer value %" PRId64 " too large", val);
+ }
+ proto_tree_add_uint(tree, hf_banana_int, tvb, start_offset, offset - start_offset, (guint32) val);
+ break;
+ case BE_STRING:
+ if (val > MAX_ELEMENT_VAL) {
+ expert_add_info_format(pinfo, NULL, &ei_banana_length_too_long, "String length %" PRId64 " longer than we can handle", val);
+ }
+ proto_tree_add_item(tree, hf_banana_string, tvb, offset, (guint32) val, ENC_ASCII);
+ offset += (gint) val;
+ break;
+ case BE_NEG_INT:
+ if (val > MAX_ELEMENT_VAL) {
+ expert_add_info_format(pinfo, NULL, &ei_banana_value_too_large, "Integer value -%" PRId64 " too large", val);
+ }
+ proto_tree_add_int(tree, hf_banana_neg_int, tvb, start_offset, offset - start_offset, (gint32) val * -1);
+ break;
+ case BE_FLOAT:
+ proto_tree_add_item(tree, hf_banana_float, tvb, offset, 8, ENC_BIG_ENDIAN);
+ offset += 8;
+ break;
+ case BE_LG_INT:
+ proto_tree_add_item(tree, hf_banana_lg_int, tvb, start_offset, offset - start_offset, ENC_NA);
+ break;
+ case BE_LG_NEG_INT:
+ proto_tree_add_item(tree, hf_banana_lg_neg_int, tvb, start_offset, offset - start_offset, ENC_NA);
+ break;
+ case BE_PB:
+ if (val_len > 1) {
+ expert_add_info(pinfo, NULL, &ei_banana_pb_error);
+ }
+ /*
+ * The spec says the pb dictionary value comes after the tag.
+ * In real-world captures it comes before.
+ */
+ proto_tree_add_item(tree, hf_banana_pb, tvb, offset - 2, 1, ENC_BIG_ENDIAN);
+ break;
+ default:
+ return 0;
+ break;
+ }
+ return offset - start_offset;
+}
+
+static int
+dissect_banana(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) {
+ guint8 byte = 0;
+ gint offset = 0, old_offset;
+ proto_item *ti;
+ proto_tree *banana_tree;
+
+ /* Check that there's enough data */
+ if (tvb_reported_length(tvb) < 2)
+ return 0;
+
+ /* Fill in our protocol and info columns */
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "Banana");
+
+ while (tvb_reported_length_remaining(tvb, offset) > 0 && offset < MAX_ELEMENT_VAL_LEN) {
+ byte = tvb_get_guint8(tvb, offset);
+ if (is_element(byte))
+ break;
+ offset++;
+ }
+ col_add_fstr(pinfo->cinfo, COL_INFO, "First element: %s",
+ val_to_str(byte, type_vals, "Unknown type: %u"));
+
+ /* Create display subtree for the protocol */
+ ti = proto_tree_add_item(tree, proto_banana, tvb, 0, -1, ENC_NA);
+ banana_tree = proto_item_add_subtree(ti, ett_banana);
+
+ offset = 0;
+ old_offset = -1;
+ while (offset > old_offset) {
+ old_offset = offset;
+ offset += dissect_banana_element(tvb, pinfo, banana_tree, offset);
+ }
+
+ /* Return the amount of data this dissector was able to dissect */
+ return tvb_reported_length(tvb);
+}
+
+/* Register the protocol with Wireshark */
+
+void
+proto_register_banana(void)
+{
+ static hf_register_info hf[] = {
+ { &hf_banana_list,
+ { "List Length", "banana.list",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "Banana list", HFILL }
+ },
+ { &hf_banana_int,
+ { "Integer", "banana.int",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "Banana integer", HFILL }
+ },
+ { &hf_banana_string,
+ { "String", "banana.string",
+ FT_STRING, BASE_NONE, NULL, 0,
+ "Banana string", HFILL }
+ },
+ { &hf_banana_neg_int,
+ { "Negative Integer", "banana.neg_int",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "Banana negative integer", HFILL }
+ },
+ { &hf_banana_float,
+ { "Float", "banana.float",
+ FT_DOUBLE, BASE_NONE, NULL, 0,
+ "Banana float", HFILL }
+ },
+ { &hf_banana_lg_int,
+ { "Float", "banana.lg_int",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "Banana large integer", HFILL }
+ },
+ { &hf_banana_lg_neg_int,
+ { "Float", "banana.lg_neg_int",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "Banana large negative integer", HFILL }
+ },
+ { &hf_banana_pb,
+ { "pb Profile Value", "banana.pb",
+ FT_UINT8, BASE_HEX, VALS(pb_vals), 0,
+ "Banana Perspective Broker Profile Value", HFILL }
+ }
+ };
+
+ expert_module_t* expert_banana;
+
+ /* Setup protocol subtree array */
+ static gint *ett[] = {
+ &ett_banana,
+ &ett_list
+ };
+
+ static ei_register_info ei[] = {
+ { &ei_banana_unknown_type, { "banana.unknown_type", PI_UNDECODED, PI_ERROR, "Unknown type", EXPFILL }},
+ { &ei_banana_too_many_value_bytes, { "banana.too_many_value_bytes", PI_UNDECODED, PI_ERROR, "Too many value/length bytes", EXPFILL }},
+ { &ei_banana_length_too_long, { "banana.length_too_long", PI_UNDECODED, PI_ERROR, "Length too long", EXPFILL }},
+ { &ei_banana_value_too_large, { "banana.value_too_large", PI_MALFORMED, PI_ERROR, "Value too large", EXPFILL }},
+ { &ei_banana_pb_error, { "banana.pb_error", PI_MALFORMED, PI_ERROR, "More than 1 byte before pb", EXPFILL }},
+ };
+
+ /* Register the protocol name and description */
+ proto_banana = proto_register_protocol("Twisted Banana", "Banana", "banana");
+
+ /* Required function calls to register the header fields and subtrees used */
+ proto_register_field_array(proto_banana, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ expert_banana = expert_register_protocol(proto_banana);
+ expert_register_field_array(expert_banana, ei, array_length(ei));
+
+ banana_handle = register_dissector("banana", dissect_banana, proto_banana);
+}
+
+void
+proto_reg_handoff_banana(void)
+{
+ dissector_add_uint_range_with_preference("tcp.port", "", banana_handle);
+}
+
+/*
+ * Editor modelines - https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
+
+
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